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question_answer1)
What is current?
A)
The flow of matter done
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B)
The flow of electrons done
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C)
The flow of protons done
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D)
The flow of charge done
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question_answer2)
In electrolytic solutions, which of the following acts as carrier of charge?
A)
Protons done
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B)
Electrons done
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C)
Neutrons done
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D)
Ions done
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question_answer3)
What are insulators?
A)
Materials that conduct electricity done
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B)
Materials that do not conduct electricity done
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C)
Materials that conduct electricity only at low temperatures done
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D)
Materials that conduct electricity at room temperature done
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question_answer4)
Which of the following is an insulator?
A)
Wood done
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B)
Iron done
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C)
Graphite done
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D)
Silver done
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question_answer5)
Which of the following circuits gives the correct way of connecting an LED to light it up?
A)
B)
C)
D)
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question_answer6)
Which of the following energy conversions takes place in a cell?
A)
Electrical energy into chemical energy done
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B)
Chemical energy into electrical energy done
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C)
Magnetic energy into electrical energy done
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D)
Electrical energy into mechanical energy done
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question_answer7)
Which of the following are the characteristics of an electrolyte?
A)
It has a positive charge. done
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B)
It has a negative charge. done
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C)
It conducts charge without dissociating. done
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D)
It forms positive and negative ions. done
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question_answer8)
Which acid is present in lemon juice that acts as an electrolyte?
A)
Sulphuric acid done
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B)
Nitric acid done
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C)
Hydrochloric acid done
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D)
Citric acid done
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question_answer9)
Which of the following is the electrolyte in a dry cell?
A)
Copper sulphate done
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B)
Zinc sulphate done
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C)
Sulphuric acid done
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D)
Ammonium chloride done
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question_answer10)
In a dry cell, which of the following acts as the positive terminal?
A)
Carbon rod done
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B)
Manganese dioxide done
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C)
Manganese dioxide and powdered carbon done
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D)
A metal cap on the carbon rod done
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question_answer11)
What is the common voltage produced by a dry cell?
A)
1.5 V done
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B)
30 V done
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C)
60 V done
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D)
3 V done
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question_answer12)
What happens when electric current is made to flow through a conductor?
A)
Some amount of electrical energy is converted into heat energy. done
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B)
Some amount of electrical energy is converted into mechanical energy. done
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C)
Some amount of mechanical energy is converted into electrical energy. done
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D)
Some amount of heat energy is converted into electrical energy. done
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question_answer13)
Nichrome is an alloy. Which of the following metals make up this alloy?
A)
Nickel and chromium done
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B)
Nitrogen and chromium done
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C)
Nitrogen, chlorine and chromium done
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D)
Nickel, chromium and manganese done
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question_answer14)
What is the splitting of a compound using electricity called?
A)
Electrolysis done
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B)
Electrolyte done
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C)
Electrokinesis done
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D)
Electrochemistry done
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question_answer15)
What is the principle involved in the glowing of an electric bulb?
A)
Magnetic effect of current done
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B)
Heating effect of current done
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C)
Chemical effect done
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D)
Conduction of current done
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question_answer16)
Why are LED?s extensively used to replace bulbs?
(i) Consume less electricity |
(ii) Have longer life |
(iii) Have more power |
A)
Only (i) and (ii) done
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B)
Only (ii) and (iii) done
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C)
Only (i) and (iii) done
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D)
(i), (ii) and (iii) done
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question_answer17)
Which of the following is the best conductor of electricity?
A)
Tap water done
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B)
Distilled water done
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C)
Sea water done
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D)
Rain water done
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question_answer18)
Which of the following effects of current is responsible for the deflection of a compass needle in an electric field?
A)
Heating effect of current done
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B)
Magnetic effect of current done
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C)
Conducting effect of heat done
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D)
Chemical effect of current done
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question_answer19)
Which of these is the industrial applications of the chemical effects of electric current?
A)
Electroplating done
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B)
Galvanizing done
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C)
Anodizing done
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D)
All of the above done
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question_answer20)
Which of the following liquids is a bad conductor of electricity?
A)
Lemon juice done
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B)
Vinegar done
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C)
Sea water done
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D)
Distilled water done
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question_answer21)
Cans used for storing food are electroplated. What is the material used for electroplating?
A)
Chrome onto tin done
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B)
Iron onto tin done
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C)
Tin onto iron done
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D)
Chrome onto iron done
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question_answer22)
What is iron coated with in order to protect it from corrosion and rust?
A)
Tin done
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B)
Copper done
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C)
Zinc done
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D)
Mercury done
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question_answer23)
Why is zinc better than tin for electro- plating a piece of iron in order to prevent it from rusting?
A)
Zinc is cheaper than tin. done
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B)
Tin is toxic. done
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C)
Zinc can prevent iron from coming into contact with water and air. done
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D)
Rusting is prevented even when the zinc layer is broken. done
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question_answer24)
Which of the following statements is correct?
A)
Distilled water is a good conductor of electricity. done
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B)
An LED glows even when a weak electric current flows through it. done
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C)
Only hydrated salt solutions conduct electricity. done
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D)
Zinc plating is done to make the object scratch proof. done
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question_answer25)
?X? is a good conductor of electricity. Which of the following could be ?X??
A)
Solid sodium chloride done
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B)
Vinegar done
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C)
Distilled water done
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D)
Liquid oxygen done
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question_answer26)
In a cell, by convention, from where does the charge seem to be flowing through?
A)
From positive electrode to negative electrode done
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B)
From negative electrode to positive electrode done
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C)
Both (A) and (B) done
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D)
Cannot be said done
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question_answer27)
Why are metals good conductors of electricity?
A)
In metals/outer electrons are strongly bound to the atom. done
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B)
In metals, outer electrons are loosely bound to the atom. done
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C)
In metals, inner electrons are loosely bound to the atom. done
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D)
In metals, protons can detach from the nucleus and conduct electricity. done
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question_answer28)
Why are cans used for storing soft drinks or food items usually electroplated with tin?
A)
Tin is less reactive than the metal the can is made of. done
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B)
Tin is cheap. done
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C)
Tin is strong and shiny in appearance done
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D)
Tin is lighter than other metals. done
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question_answer29)
A During the electrolysis of \[\text{CuS}{{\text{O}}_{\text{4}}}\]solution, sulphate ions move towards the
A)
copper electrode. done
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B)
anode. done
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C)
cathode. done
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D)
zinc electrode. done
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question_answer30)
A bulb does not glow when the probe are hanging in air. Why?
A)
Air absorbs electricity. done
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B)
Air is a bad conductor of electricity. done
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C)
Electricity is discharged into air. done
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D)
Air disperses electricity. done
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question_answer31)
Iron vessels are coated with tin to
A)
give better shining. done
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B)
increase the strength. done
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C)
increase weight. done
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D)
prevent rusting. done
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question_answer32)
Observe the given figure.
What is the purpose of this experimental setup?
A)
To check the conductivity of copper sulphate solution. done
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B)
To get iron electroplated. done
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C)
To check the continuity of charge flow in the circuit. done
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D)
To make the electric bulb glow. done
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question_answer33)
A What is the process of depositing a layer of a desired metal on another material by passing electric current called?
A)
Electrolysis done
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B)
Electroplating done
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C)
Chromium plating done
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D)
Galvanizing done
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question_answer34)
A Which of the following statements is NOT correct?
A)
The ions are free to move about in an electrolyte. done
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B)
The solution which can form ions is used for electroplating. done
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C)
Acids are bad conductors of electricity. done
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D)
An electric bulb glows due to the heating effect of current. done
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question_answer35)
The charges present on the various objects are shown below in the figure. In which of the following cases does a force of repulsion act between them?
A)
B)
C)
D)
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