6. Work done is maximum when force is _______ to displacement.
(a) Equal
(b) Perpendicular
(c) Opposite
(d) Parallel
7. The units of work are the same as those of :
(a) Power
(b) Energy
(c) Force
(d) Mass
8. The rate of doing work is called :
(a) Energy
(b) Power
(c) Force
(d) Inertia
9. The SI unit of power is :
(a) Joule
(b) Erg
(c) Dyne
(d) Watt
10. In the vector form power is expressed as :
(a) P = F . V
(b) P = F x V
(c) P = V x F
(d) P = F . d
Related Posts
5555555555 20. A 68 Ω resistor is connected across the terminals of a 3 V battery. The power dissipation of the resistor is ________. (a) 132 mW (b) 13.2 mW (c) 22.6 mW (d) 226 mW- 5555555555 26. A 120 Ω resistor must carry a maximum current of 25 mA. Its rating should be at least ________. (a) 4.8 W (b) 150 mW (c) 15 mW (d) 480 mW
- 5555555555 17. A 15 V source is connected across a 12 Ω resistor. How much energy is used in three minutes? (a) 938 Wh (b) 0.938 Wh (c) 56.25 Wh (d) 5.6 Wh
- 5555555555 35. When the current through a 12 kΩ resistor is 8 mA, the power is ________. (a) 7.68 mW (b) 768 mW (c) 7.68 W (d) 76.8 W
- 5555555555 33. A 220 Ω resistor dissipates 3 W. The voltage is ________. (a) 73.3 V (b) 2.5 V (c) 25.7 V (d) 257 V