A transformer rises the voltage in proportion of 1 to 10. If the power in the primary coil is 100 watts, we should expect a power of ____ watts in the secondary coil. a) 10b) 100c) 1,000
Transformers can step up voltage, but in doing so, they step 'down' the current. Ideally, the voltage will rise by the same proportion as the current will fall. And since power is PVI, the power will remain unchanged. So the answer is that the power in the secondary should be the same as the power in the primary, which is 100W.
