Physicsmedium · Past Paper
If four 100W bulbs are used for 5 hours every day, how many units of electricity are consumed in 1 day?
A2 units
B20 units
C0.5 units
D10 units
✓ Correct Answer: A — 2 units
Total Power = 4 * 100W = 400W = 0.4kW. Energy = 0.4kW * 5h = 2 kWh (2 units).
Share this question
More from Physics
- What is the rate of change of displacement called?
- The refractive index of a prism is 1.5 and the angle of prism is 60. The angle of minimum deviation is:
- If the distance-time graph is a horizontal line parallel to the time axis, the body is:
- A balloon is at a height of 81m and is ascending with a velocity of 12 m/s. A body is dropped from it. If g=10, the body reaches ground in:
- How many Joules are there in 1 kWh?