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
- Displacement is a ________ quantity.
- In a hydroelectric power plant, which energy is finally converted into electrical energy?
- What happens to the loudness if we increase the surface area of a vibrating body?
- A car is moving with a constant speed of 20 m/s. The engine exerts a force of 500 N. The power of the engine is:
- What is the nature of the image formed by a plane mirror?