Physics GK Question Quiz 3
Que: A car traveled 50 m in 30 sec along a horizontal road. It reached the destination with
a velocity 4 times of its initial velocity. During the process, what happens to
the potential energy of the car?
1. Became 2 times of initial potential
energy
2. Became 4 times of initial PE
3. Became 8 times of initial PE
4. Did not change
Correct Answer:- 4. Did
not change
Que: A black body is at a temperature of 727°C. It emits energy at a
rate which is proportional to:
1. (1000)3
2. (1000)4
3. (727)2
4. (727)4
Correct
Answer :- (1000)4
Que: Which of the following is not a characteristic of a musical sound?
1. Quality
2. Loudness
3. Wavelength
4. Pitch
Correct Answer:- Wavelength
Que: Which of the following does not have unit as Joule?
1. Work
2. Force
3. Kinetic energy
4. Heat
Correct Answer:- Force
Que: Which among the following does not possess kinetic energy?
1. A ball thrown upwards
2. A battery
3. A moving car
4. A flying bird
Correct Answer:- A battery
Que: A train moving with a velocity of 30 km/h has a kinetic energy of
52000 J. When the velocity of train is increased to 60 km/h, the work done is:
1. Work done = 0
2. 156000 J
3. 104000 J
4. 52000 J
Correct Answer :- 156000 J
Que: A body of mass 2 kg undergoes a change of velocity of 5 m/s in 5s.
The force acting on it is:
1. 10 N
2. 1 N
3. 2 N
4. 5 N
Correct Answer :- 2 N
Que: If the object is at rest, then the slope of position-time graph:
1. is zero
2. may be zero
3. cannot be zero
4. always greater than zero
Correct Answer :- is zero
Que: If the velocity of an object is directly proportional to the time,
then the object has:
1. variable acceleration
2. uniform acceleration
3. uniform velocity
4. uniform speed
Correct Answer :- uniform
acceleration
Que: Bats detect obstacles on their path by receiving the
reflected_________.
1. electro-magnetic waves
2. ultrasonic waves
3. radio waves
4. infrasonic waves
Correct Answer :- ultrasonic
waves
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