Suppose we have a magnet and shove it into a coil of wire. If we want to get 3 t
ID: 1977557 • Letter: S
Question
Suppose we have a magnet and shove it into a coil of wire. If we want to get 3 times the voltage without changing magnets or the speed at which the magnet enters the coil then we must:triple the number of loops of wire in the coil
reduce the number of coils in the wire to 1/3 of its previous value
realize that this is impossible
Suppose you have three lights hooked together in a circuit with a battery. If you unscrew one of the lights the other two go out. This is true no matter which lights you unscrew. The lights are hooked together:
in parallel
in series
partially in parallel and partially in series
in quadrature with each other
Explanation / Answer
Answer: A) Triple the loops. More loops means more induced EMF (volts). B) Series. If all three lights are in series, disconnecting any of them would mean that the closed circuit is now entirely open. No way for the electricity to flow from the positive terminal of the battery back into the negative terminal because there is a gap. Hence all lights are out.