Physicshard · Past Paper
An electric bulb of 60 W is used for 10 hours daily. How many 'units' of energy are consumed in 30 days?
A18 units
B1.8 units
C180 units
D0.18 units
✓ Correct Answer: A — 18 units
Total energy = (60W * 10h * 30 days) / 1000 = 18 kWh. 1 kWh is 1 unit.
Share this question
More from Physics
- A body of mass 5 kg is falling from a height of 10 m. What is its kinetic energy at the midpoint of its fall?
- If a body travels with a uniform velocity, its acceleration is:
- What is the weight of a 50 kg body in a lift falling freely?
- Twinkling of stars is due to:
- If a body of mass m starts falling from point A at height h, what is its velocity at point B which is at height h/2?