Physicshard · Past Paper
An ideal transformer has 100% efficiency. If input power is 500W and output voltage is 50V, what is the output current?
A1 A
B5 A
C10 A
D25 A
✓ Correct Answer: C — 10 A
Power_in = Power_out (for ideal). 500W = 50V * I_out. I_out = 500 / 50 = 10 Amperes.
Share this question
More from Physics
- If a body is moving with a constant velocity of 10 m/s, how far will it travel in 1 minute?
- 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?
- A bird flies 100m North, then 100m South. Its average velocity is:
- A body of mass 100g is moving with a velocity of 5m/s. Its momentum is:
- Power is defined as the rate of: