200J
4000J
2000J
500J
Correct answer is C
Kinetic Energy = mgh
= 20 x 10 x 10 J
= 2000J
Which of the following is NOT part of an a.c generator? ...
Which of the following are true of plane-polarised light? i. Plane polarisation of light is the f...
The fundamental frequency of vibration of a sonometer wire may be halved by ...
The difference between sound waves and light waves is that sound waves ...
The energy contained in a wire when it extended by 0.02m by a force 500 N is ...
Which of the following devices is associated with alternating currents only? ...