Home › AP EAPCET (Engineering) › Physics › Work, Energy and Power › A 100 W bulb burns for 10 hours. How much energy…
A 100 W bulb burns for 10 hours. How much energy does it use?
A10 kWh
B1 kWh
C100 kWh
D0.1 kWh
Answer & Solution
Correct answer: B. 1 kWh
100 W times 10 h is 1000 watt hours, which equals 1 kWh.
Related questions
Horse-power is still commonly used to describe the output of:The potential energy of a body under a conservative force is always fixed only up to:Power, like work and energy, is what kind of physical quantity?The work-energy theorem holds in which frames of reference?Total mechanical energy of a body stays constant provided the only forces acting on it areAfter which inventor is the SI unit of power named?A motor pulls with a force of 22000 N at a steady 2 m/s. What power does it supply?During an elastic collision, the kinetic energy of the system at each instant of contact i