The escape velocity form the earth surface in km S-1 is____________________?
A. 4.2 km S-1
B. 7.5 km S-1
C. 9.5 km S-1
D. 1.1 km S-1
Physics Mcqs
The consumption of energy by a 60 watt bulb in 2 sec is_________________?
The consumption of energy by a 60 watt bulb in 2 sec is_________________?
A. 120 J
B. 60 J
C. 30 J
D. 0.02 J
Which of the following is not conservative force_________________?
Which of the following is not conservative force_________________?
A. friction
B. electric
C. gravitational
D. magnetic
If velocity is doubled then__________________?
If velocity is doubled then__________________?
A. momentum increases 4 times and K.E increases 2 times
B. momentum and K.E. remain same
C. momentum increases 2 times and K.E increases constant
D. momentum increases 2 times and K.E increases 4 time
Work done by the force of friction is____________________?
Work done by the force of friction is____________________?
A. always positive
B. always negative
C. positive only for small frictional force
D. positive only for large frictional force
The source of geothermal energy is___________________?
The source of geothermal energy is___________________?
A. decay of radioactive element in the earth
B. compression of material in the earth
C. residual lost of the earth
D. all as said in A – B and C
The escape velocity of a body in gravitational field of earth is independent of__________________?
The escape velocity of a body in gravitational field of earth is independent of__________________?
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
Work done by variable force is determine by dividing____________________?
Work done by variable force is determine by dividing____________________?
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
Proton electron neutron and a particles have same momentum. Which of them have highest K.E ?
Proton electron neutron and a particles have same momentum. Which of them have highest K.E ?
A. Proton
B. electron
C. neutron
D. a-particle
The average power and instantaneous power become equal if work is done at __________________?
The average power and instantaneous power become equal if work is done at __________________?
A. any rate
B. at variable rate
C. at uniform rate
D. at high rate