Physicsmedium · Past Paper
If the cost of electricity is Rs. 10 per unit, how much does it cost to run a 2kW heater for 5 hours?
ARs. 10
BRs. 50
CRs. 100
DRs. 200
✓ Correct Answer: C — Rs. 100
Energy = 2kW * 5h = 10 units. Cost = 10 units * Rs. 10 = Rs. 100.
Share this question
More from Physics
- The sum of kinetic and potential energy of a falling body at any point is:
- A car travels half of the distance at speed v1 and the other half at speed v2. The average speed is:
- What is the unit of electric power?
- When velocity of a body is halved, its KE becomes:
- The ratio of gravitational force on the moon to that on Earth for the same mass is: