Physicsmedium · Past Paper
The brightness of a bulb depends primarily on its:
AVoltage rating
BCurrent rating
CPower dissipation
DResistance
✓ Correct Answer: C — Power dissipation
Actual power dissipation (P=VI or I^2R) determines how much light and heat energy is emitted.
Share this question
More from Physics
- An ideal transformer has 100% efficiency. If input power is 500W and output voltage is 50V, what is the output current?
- A ray of light that strikes a surface is called:
- The distance between the pole and the principal focus of a spherical mirror is called:
- Which of the following materials is a good conductor of electricity?
- A stone is dropped from a balloon rising upwards with a velocity of 12 m/s. If the balloon is at a height of 65m when the stone is dropped, how long will the stone take to reach the ground? (g=10 m/s^2)