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question_answer1)
Which of the following systems of units is not based on units of mass, length and time alone?
A)
SI done
clear
B)
MKS done
clear
C)
CGS done
clear
D)
FPS done
clear
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question_answer2)
Mass is the measure of
A)
matter contained done
clear
B)
weight done
clear
C)
force done
clear
D)
none of these done
clear
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question_answer3)
Among the following the derived quantity is
A)
mass done
clear
B)
length done
clear
C)
density done
clear
D)
time done
clear
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question_answer4)
Which of the following is not a fundamental unit?
A)
newton done
clear
B)
kilogram done
clear
C)
metre done
clear
D)
second done
clear
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question_answer5)
In SI units the number of basic physical quantities are
A)
3 done
clear
B)
7 done
clear
C)
9 done
clear
D)
21 done
clear
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question_answer6)
Light year is [SSC CGL]
A)
light emitted by the sun in one year done
clear
B)
time taken by light to travel from sun to earth done
clear
C)
the distance travelled by light in free space in one year done
clear
D)
time taken by earth to go once around the sun done
clear
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question_answer7)
One micron equals to
A)
\[{{10}^{-3}}m\] done
clear
B)
\[{{10}^{-9}}m\] done
clear
C)
\[{{10}^{-6}}m\] done
clear
D)
\[{{10}^{-2}}m\] done
clear
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question_answer8)
Practical unit of heat is
A)
Calorie done
clear
B)
Horse power done
clear
C)
Joule done
clear
D)
Watt done
clear
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question_answer9)
Match List I (Units) with List II (Physical quantity) and select the correct answer using the codes given below the lists. [CDS]
|
List I (Units) |
|
List II Physical quantity) |
[A] |
Watt |
1. |
Electric charge |
[B] |
Tesla |
2. |
Power |
[C] |
Coulomb |
3. |
Luminous intensity |
[D] |
Candela |
4 |
Magnetic field |
A)
A-1, B-4, C-1, D-3 done
clear
B)
A-1, B-2, C-3, D-4 done
clear
C)
A-1, B-2, C-4, D-3 done
clear
D)
A-2, B-4, C-3, D-1 done
clear
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question_answer10)
Assertion: Number of significant figures in 0.005 is one and that in 0.500 is three. |
Reason: This is because zeros are not significant. |
A)
If both Assertion and Reason are correct and Reason is the correct explanation of Assertion. done
clear
B)
If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion. done
clear
C)
If Assertion is correct but Reason is incorrect. done
clear
D)
If Assertion is incorrect but Reason is correct. done
clear
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question_answer11)
Match List I (Physical quantity) with List II (Units) and select the correct answer using the codes given below the lists.
List I (Physical quantity) (Units) |
List II (Physical quantity) |
A. Power |
1. kg \[m{{s}^{-1}}\] |
B. Energy |
2. kg \[{{m}^{2}}{{s}^{-1}}\] |
C. Momentum |
3. \[N{{m}^{-2}}\] |
D. Pressure |
4. kW |
|
5. kWh |
A)
A-4, B-5, C-1, D-3 done
clear
B)
A-4, B-5, C-1, D-2 done
clear
C)
A-5, B-4, C-1, D-2 done
clear
D)
A-5, B-4, C-2, D-3 done
clear
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question_answer12)
What is the correct sequence in which the lengths of the following units increase?
1. Angstrom |
2. Micron |
3. Nanometer |
Select the correct answer using the code given below: [NDA]
A)
1, 2, 3 done
clear
B)
3, 1, 2 done
clear
C)
1, 3, 2 done
clear
D)
2, 3, 1 done
clear
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question_answer13)
Which one of the following is not a dimension less quantity?
A)
Strain done
clear
B)
Relative density done
clear
C)
Frequency done
clear
D)
Angle done
clear
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question_answer14)
Match List 'I' (Physical quantity) with list II (Dimension) and select the correct answer by using the codes given below the lists.
List I (Physical quantity) |
List II (Dimension) |
A. Density |
1. [\[ML{{T}^{-2}}\]] |
B. Force |
2. [\[M{{L}^{-3}}\]] |
C. Energy |
3. [\[ML{{T}^{-1}}\]] |
D. Momentum |
4. [\[M{{L}^{2}}{{T}^{-2}}\]] |
A)
A-3, B-2, C-4, D-1 done
clear
B)
A-1, B-2, C-3, D-4 done
clear
C)
A-2, B-1, C-4, D-3 done
clear
D)
A-3, B-2, C-1, D-4 done
clear
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question_answer15)
'Farad' is the unit of [SSC CGL]
A)
resistance done
clear
B)
conductance done
clear
C)
capacitance done
clear
D)
inductance done
clear
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question_answer16)
S.I. unit of surface tension is
A)
degree/cm done
clear
B)
N/m done
clear
C)
\[N/{{m}^{2}}\] done
clear
D)
N m done
clear
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question_answer17)
Match List I (Physical quantity) with list II (Units) and select the correct answer by using the codes given below the lists.
|
List I (Physical quantity)
|
|
List II (Units)
|
A.
|
Solid angle
|
1.
|
Pascal
|
B.
|
Impulse
|
2.
|
Steradian
|
C.
|
Vicosity
|
3.
|
Newton-second
|
D.
|
Pressure
|
4.
|
Pascal-second
|
A)
A-2, B-4, C-3, D-1 done
clear
B)
A-2, B-3, C-4, D-1 done
clear
C)
A-1, B-4, C-3, D-2 done
clear
D)
A-1, B-3, C-4, D-2 done
clear
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question_answer18)
Which one of the following pairs does not have the same dimension? [NDA]
A)
Potential energy and kinetic energy done
clear
B)
Density and specific gravity done
clear
C)
Focal length and height done
clear
D)
Gravitational force and frictional force done
clear
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question_answer19)
Match List I (Items) with List II (Unit of length) and select the correct answer by using the codes given below the lists.
|
List I (Items) |
|
List II (Units of length) |
A. |
Distance between earth and stars |
1 |
Microns |
B. |
Interatomic distances in a solid |
2 |
Angstroms |
C. |
Size of the nucleus |
3 |
Light years |
D. |
Wavelength of infrared laser |
4 |
Fermi |
|
|
5 |
kilometres |
A)
A-5, B-4, C-2, D-1 done
clear
B)
A-3, B-2, C-4, D-1 done
clear
C)
A-5, B-2, C-4, D-3 done
clear
D)
A-3, B-4, C-1, D-2 done
clear
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question_answer20)
Assertion: Density is a derived physical quantity. |
Reason: Density cannot be derived from the fundamental physical quantities. |
A)
If both Assertion and Reason are correct and Reason is the correct explanation of Assertion. done
clear
B)
If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion. done
clear
C)
If Assertion is correct but Reason is incorrect. done
clear
D)
If Assertion is incorrect but Reason is correct. done
clear
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question_answer21)
The numerical ratio of displacement to the distance covered is always.
A)
less than one done
clear
B)
equal to one done
clear
C)
equal to or less than one done
clear
D)
equal to or greater than one done
clear
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question_answer22)
An iron ball and a wooden ball of same radius are released from a height 'h' in vacuum. Which of the two balls would take more time to reach the ground?
A)
Iron ball done
clear
B)
Both would take same time done
clear
C)
Wooden ball done
clear
D)
None of these done
clear
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question_answer23)
If an object undergoes a uniform circular motion, then its [NDA]
A)
acceleration remains uniform done
clear
B)
velocity changes done
clear
C)
speed changes done
clear
D)
velocity remains uniform done
clear
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question_answer24)
Which one of the following remains constant while throwing a ball upward? [NDA]
A)
Displacement done
clear
B)
Kinetic energy done
clear
C)
Acceleration done
clear
D)
Velocity done
clear
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question_answer25)
A passenger in a moving train tosses a five rupee coin. If the coin falls behind him, then the train must be moving with a uniform
A)
acceleration done
clear
B)
deceleration done
clear
C)
speed done
clear
D)
velocity done
clear
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question_answer26)
Which of the following distance-time graph (x-t) represents one-dimensional uniform motion? [IAS Prelim]
A)
B)
C)
D)
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question_answer27)
A stone is thrown vertically upwards with an initial velocity u from the top of a tower of height \[\frac{12{{u}^{2}}}{g}\]. With what velocity does the stone reach the ground? [NDA]
A)
u done
clear
B)
4u done
clear
C)
5u done
clear
D)
\[2\sqrt{6}u\] done
clear
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question_answer28)
Which one of the following characteristics of the particle does the shaded area of the velocity-time graph shown represent? [NDA]
A)
Momentum done
clear
B)
Acceleration done
clear
C)
Distance covered done
clear
D)
speed done
clear
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question_answer29)
A parachutist jumps from a height of 5000 metre. The relationship between his falling speed, v and the distance fallen through d is best represented as : [IAS Prelim]
A)
B)
C)
D)
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question_answer30)
A spherical body moves with a uniform angular velocity (\[\omega \]) around a circular path of radius r. Which one of the following statements is correct? [IAS Prelim]
A)
The body has no acceleration done
clear
B)
The body has a radial acceleration \[{{\omega }^{2}}r\] directed toward centre of path done
clear
C)
The body has a radial acceleration 2/52/5\[{{\omega }^{2}}r\] directed away from the centre of the path done
clear
D)
The body has an acceleration \[{{\omega }^{2}}r\] tangential to its path done
clear
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question_answer31)
If d denotes the distance covered by a car in time t and \[\vec{S}\] denotes the displacement by the car during the same time, then: [NDA]
A)
\[d\le \left| {\vec{S}} \right|\] done
clear
B)
\[d=\left| {\vec{S}} \right|\] only done
clear
C)
\[d\ge \left| {\vec{S}} \right|\] done
clear
D)
\[d\prec \left| {\vec{S}} \right|\] done
clear
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question_answer32)
The displacement of a particle at time t is given by \[\vec{x}=a\hat{i}+bt\hat{j}+\frac{c}{2}{{t}^{2}}\hat{k}\] where a, b and c are positive constants. Then the particle is [NDA]
A)
accelerated along \[\frac{18}{5}\] direction done
clear
B)
decelerated along \[\frac{18}{5}\] direction done
clear
C)
decelerated along \[\hat{j}\] direction done
clear
D)
accelerated along \[\hat{j}\] direction done
clear
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question_answer33)
A body is projected vertically upwards with a velocity of 96 ft/s. What is the total time for which the body will remain in the air?
A)
3 s done
clear
B)
6 s done
clear
C)
9 s done
clear
D)
12 s done
clear
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question_answer34)
A motor vehicle is moving on a circle with a uniform speed. The net acceleration of the vehicle is [NDA]
A)
zero done
clear
B)
towards the centre of circle done
clear
C)
away from the centre along the radius of the circle done
clear
D)
perpendicular to the radius and along the velocity done
clear
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question_answer35)
A swinging pendulum has its maximum acceleration at [NDA]
A)
the bottom of the swing done
clear
B)
the two extremities of the swing done
clear
C)
every point on the swing done
clear
D)
no particular portion of the pendulum done
clear
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question_answer36)
An object is in uniform circular motion on a plane. Suppose that you measure its displacement from the centre along one direction, say, along the x-axis. Which one among the following graphs could represent this displacement (x)? [NDA]
A)
B)
C)
D)
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question_answer37)
A particle starts from rest, accelerates uniformly for 3 seconds and then decelerates uniformly for 3 seconds and comes to rest. |
Which one of the following displacement (x)-time (t) graphs represents the motion of the particle? [NDA]
A)
B)
C)
D)
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question_answer38)
In the system shown, the masses are released from rest. What shall be the acceleration of the moving masses? [NDA]
A)
g done
clear
B)
2g/3 done
clear
C)
g/3 done
clear
D)
g/2 done
clear
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