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question_answer1)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: |
Assertion (A): In a simple battery circuit the point of lowest potential is positive terminal of the battery. |
Reason (R): The current flows towards the point of the higher potential as it flows in such a circuit from the negative to the positive terminal. |
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
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question_answer2)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: |
Assertion (A): Electrons which constitute the current are negatively charged. |
Reason (R): Current carrying wire is negatively charged. |
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
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question_answer3)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: |
Assertion (A): Current can be represented with an arrow. |
Reason (R): Current is a vector quantity. |
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
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question_answer4)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: |
Assertion (A): The current in a wire is due to flow of free electrons in a definite direction. |
Reason (R): A current carrying wire should have non-zero charge. |
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
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question_answer5)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: |
Assertion (A): Electric field outside the conducting wire which carries a constant current is zero. |
Reason (R): Net charge on conducting wire is zero. |
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow
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question_answer6)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: |
Assertion (A): There is no current in the metals in the absence of electric field. |
Reason (R): Motion of free electron is random. |
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
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question_answer7)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: |
Assertion (A): Current flows in a conductor only when there is an external electric field within the conductor. |
Reason (R): The drift velocity of the electrons is directly proportional to the electric field. |
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow
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question_answer8)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: |
Assertion (A): Bending a wire does not effect electrical resistance. |
Reason (R): Resistance of wire is proportional to resistivity of material. |
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow
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question_answer9)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: |
Assertion (A): The resistance of a conductor decreases with increase in cross-sectional area. |
Reason (R): On increasing the cross-sectional area of a conductor, more current will flow through the conductor. |
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow
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question_answer10)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: |
Assertion (A): For good conductors, the I-V graph is a perfect straight line inclined to current axis. |
Reason (R): By Ohm's law, voltage across the ends of a conductor is directly proportional to the resistance of the conductor. |
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow
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question_answer11)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: Assertion (A): The drift velocity of electrons in a metallic wire will decrease, if the temperature of the wire is increased. Reason (R): On increasing temperature, conductivity of metallic wire decreases.
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow
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question_answer12)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: Assertion (A): Drift velocity of electrons is independent of time. Reason (R): Electrons are accelerated in the presence of electric field.
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow
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question_answer13)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: Assertion (A): The electric bulbs glows immediately when switch is on. Reason (R): The drift velocity of electrons in a metallic wire is very high.
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow
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question_answer14)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: Assertion (A): The drift velocity of electrons in a metallic wire will decrease, if the temperature of the wire is increased. Reason (R): On increasing temperature, conductance of metallic wire decreases.
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow
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question_answer15)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: Assertion (A): If we bend an insulated conducting wire, the resistance of the wire increases. Reason (R): The drift velocity of electrons in bent wire decreases.
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow
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question_answer16)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: Assertion (A): If the Length of the conductor is doubled, the drift velocity will become half of the original value. (Keeping potential difference unchanged.) Reason (R): At constant potential difference, drift velocity is inversely proportional to the length of the conductor.
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow
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question_answer17)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: Assertion (A): The current flowing through a conductor is directly proportional to the drift velocity. Reason (R): As the drift velocity increases the current flowing through the conductor decreases.
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow
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question_answer18)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: Assertion (A): Ohm's law is not valid, if current depends on voltage non-linearly. Reason (R): Ohm's law is a fundamental law of nature.
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow
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question_answer19)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: Assertion (A): The resistivity of a semiconductor increases with temperature. Reason (R): The atoms of a semiconductor vibrate with larger amplitude at higher temperatures thereby increasing its resistivity.
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow
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question_answer20)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: Assertion (A): Electric appliances with metallic body have three connections, whereas an electric bulb has a two pin connection. Reason (R): Three pin connections reduce heating of connecting wires.
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow
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question_answer21)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: Assertion (A): Material used in the construction of a standard resistance is constantan or manganin. Reason (R): Temperature coefficient of constantan is very small.
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow
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question_answer22)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: Assertion (A): The temperature coefficient of resistance is always positive only for metals. Reason (R): On increasing the temperature, the resistance of metals and alloys increases.
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow
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question_answer23)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: Assertion (A): Some electric appliances have three pins, even though, if we remove the top pin, it will continue working. Reason (R): The third pin is used only as a safety device.
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow
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question_answer24)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: Assertion (A): Heater wire must have high resistance and high melting point. Reason (R): If resistance is high, the electric conductivity will be less.
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow
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question_answer25)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: Assertion (A): Electromotive force is a force which helps the electrons to flow and produce current. Reason (R): Electromotive force is independent of the voltage across the cell.
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow
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question_answer26)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: Assertion (A): Kirchhoffs junction rule can be applied to a junction of several lines or a point in a line. Reason (R): When steady current is flowing, there is no accumulation of charges at any junction or at any point in a line.
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow
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question_answer27)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: Assertion (A): In meter bridge experiment, a high resistance is always connected in series with a galvanometer. Reason (R): As resistance increases current through the circuit increases.
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow
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question_answer28)
Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: Assertion (A): Potentiometer is used only to compare potential differences. Reason (R): The potentiometer draws current from the voltage source being measured.
A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) done
clear
B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) done
clear
C)
Assertion (A) is true but Reason (R) is false done
clear
D)
Assertion (A) is false and Reason (R) is also false done
clear
View Solution play_arrow