- [PPSC 2017] Work done to stop the motion of car is equivalent to:?
Thermal Energy
K.E.
P.E.
None of these - [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 - [PPSC 2017] Zeroth law is also known as:?
Law of engines
Law of refrigerator
Law of thermal equilibrium
None of these - [PPSC 2017] Electromagnetic waves have:?
Positive charge
Negative charge
both (a) and (b)
None of these - [PPSC 2017] Magnitude of 5N and 7N forces can give the resultant of:?
1N
2N
35 N
None of these - [PPSC 2017] Change in momentum is independent of?
Velocity
acceleration
time
None of these - [PPSC 2017] Significant Figures in 0.005307 are?
six
four
three
None of these - [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 - [PPSC 2017] The value of ‘g’ at the center of the Earth is??
Infinity
9.8 m/s^2
zero
None of these - [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
- Dyne is to force, as Kyser is to:?
Viscosity
Wave number
gravitational acceleration
None of these - Dimensionless quantity out of the following is:?
Angular velocity
Angular Magnification
Angular frequency
None of these - Dimension of Young’s modulus is same as that of?
Stress
Modulus of elasticity
Strain/Stress
both (a) and (b)
None of these - A semi-circle has _ radians while sphere has _ steradians respectively.?
π, 2π
π, 4π
2π, 4π
4π, 2π - 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 - 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 - Mass of an object has 4% uncertainty. The momentum supplied is 10% uncertain. Total % uncertainty in “K.E.” is?
5%
24%
25 %
28% - The time that light takes for one astronomical unit is approximately:?
1.3 sec
1 min
8 mins
365.25 days - 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 - [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