A bulb is rated as 270V, 0.5 A. Its power is
125 watt
60 watt
135 watt
100 watt
V = 270 V, I = 0.5 A
P = V × I = 270 × 0.5 = 135 watt
A weight lifter lifts 300 kg from the ground to a height of 2 meter in 3 second. The average power generated by him is
The work done by the heart to beat one time is 1.2 J. If it beats 72 times in 1 minute, calculate the power of heart.