Physicshard · Past Paper
What is the total energy consumed in Joules by a 100W bulb in 24 hours?
A2400 J
B86,400 J
C8,640,000 J
D240,000 J
✓ Correct Answer: C — 8,640,000 J
Energy = Power * Time = 100W * (24 * 3600)s = 100 * 86400 = 8,640,000 J.
Share this question
More from Physics
- Which of the following is used to convert a galvanometer into a voltmeter?
- A body is dropped from a height H. The time taken to cover the second half of the height is:
- In a series circuit of three identical resistors, the total power dissipated is P. If they are reconnected in parallel to the same source, the total power will be:
- Two resistors of 30Ω and 60Ω are connected in parallel and this combination is connected to a 30V battery. What is the current through the 30Ω resistor?
- The speed of sound in air is 'V'. If the absolute temperature of the air is doubled, the new speed will be: