1. [PPSC 2017] Work done to stop the motion of car is equivalent to:?
   Thermal Energy
   K.E.
   P.E.
   None of these
2. [PPSC 2017] Work done in circular motion after complete cycle? Radius is 5m with vehicle having speed of 5m/s.?
   5J
   25J
   50J
   None of these
3. [PPSC 2017] Zeroth law is also known as:?
   Law of engines
   Law of refrigerator
   Law of thermal equilibrium
   None of these
4. [PPSC 2017] Electromagnetic waves have:?
   Positive charge
   Negative charge
   both (a) and (b)
   None of these
5. [PPSC 2017] Magnitude of 5N and 7N forces can give the resultant of:?
   1N
   2N
   35 N
   None of these
6. [PPSC 2017] Change in momentum is independent of?
   Velocity
   acceleration
   time
   None of these
7. [PPSC 2017] Significant Figures in 0.005307 are?
   six
   four
   three
   None of these
8. [PPSC 2017] Tangential acceleration of a rotating body is equal to the product of distance from center and .. ??
   angular acceleration
   square of Tangential velocity
   angular velocity
   None of these
9. [PPSC 2017] The value of ‘g’ at the center of the Earth is??
   Infinity
   9.8 m/s^2
   zero
   None of these
10. [PPSC 2017] What is the vector force due to a potential energy U = 1/2kx^2?
    kx
    -kx
    1/2 kx
    None of these

Physics Quiz 0\2-April-2023

11. Dyne is to force, as Kyser is to:?
    Viscosity
    Wave number
    gravitational acceleration
    None of these
12. Dimensionless quantity out of the following is:?
    Angular velocity
    Angular Magnification
    Angular frequency
    None of these
13. Dimension of Young’s modulus is same as that of?
    Stress
    Modulus of elasticity
    Strain/Stress
    both (a) and (b)
    None of these
14. A semi-circle has _ radians while sphere has _ steradians respectively.?
    π, 2π
    π, 4π
    2π, 4π
    4π, 2π
15. The solid angle subtended at the center of sphere is 3 Sr. by an area of 300 cm^2. What is the radius of sphere??
    10 cm
    20 cm
    0.01 cm
    None of these
16. An experiment is performed to determine value of ‘g’ repeated for five times: 9.77, 9.81, 9.89, 9.79, 9.86 (in units of m/s^2). The correct statement about this experiment is?
    Precise but not accurate
    Precise as well accurate
    Accurate but not precise
    None of these
17. Mass of an object has 4% uncertainty. The momentum supplied is 10% uncertain. Total % uncertainty in “K.E.” is?
    5%
    24%
    25 %
    28%
18. The time that light takes for one astronomical unit is approximately:?
    1.3 sec
    1 min
    8 mins
    365.25 days
19. Dimension analysis does not give us information about?
    whether a physical quantity is a scalar or vector.
    the shape of the object
    the dimensional constant
    Both (A) and (C)
    All of these
20. [PPSC 2022] A free falling body having mass 10 kg moving with 8 m/s hits ground and rebounds with 6 m/s. Find magnitude of the change in momentum??
    20 Ns
    140 Ns
    70 Ns
    None of these