Options:
- A. power
- B. work
- C. impulse
- D. torque
View Answer
A. power
Physics
If a body a mass of 2 kg is raised vertically through 2m, then the work done will be _________________?
Options:
- A. 38.2 J
- B. 392.1 J
- C. 39.2 J
- D. 3.92 J
View Answer
C. 39.2 J
The source of tidal energy is____________________?
Options:
- A. sun
- B. earth
- C. both A and B
- D. moon
View Answer
D. moon
The average power and instantaneous power become equal if work is done at __________________?
Options:
- A. any rate
- B. at variable rate
- C. at uniform rate
- D. at high rate
View Answer
C. at uniform rate
On a clear day at noon the solar energy reaching the earth is ____________________?
Options:
- A. 1.44kw/m2
- B. 1.4kw/m2
- C. 1 kw/m2
- D. none
View Answer
C. 1 kw/m2
Proton electron neutron and a particles have same momentum. Which of them have highest K.E ?
Options:
- A. Proton
- B. electron
- C. neutron
- D. a-particle
View Answer
B. electron
Work done will be maximum if the angle between the force F and displacement d is______________________?
Options:
- A. 45
- B. 90
- C. 180
- D. 0
View Answer
D. 0
Work done by variable force is determine by dividing____________________?
Options:
- A. force into small interval
- B. displacement into small interval
- C. both force and displacement into small intervals
- D. force into small and displacement into large intervals
View Answer
B. displacement into small interval
A field in which the work done in a moving a body along closed path is zero is called________________?
Options:
- A. electric field
- B. conservative field
- C. electromagnetic field
- D. gravitational field
View Answer
B. conservative field
The escape velocity of a body in gravitational field of earth is independent of__________________?
Options:
- A. its mass
- B. the angle at which it is thrown
- C. both its mass and the angle at which it is thrown
- D. gravitational field of earth
View Answer
C. both its mass and the angle at which it is thrown