20. When a magnet is plunged into a conducting coil with two turns, a voltage is
ID: 3161801 • Letter: 2
Question
20. When a magnet is plunged into a conducting coil with two turns, a voltage is induced in the coil and a current flows in the circuit. The magnet is then plunged at the same rate into a conducting coil with eight turns. What happens to the induced voltage?
It is eight times as great.
It is the same.
It is four times as great.
It is one-fourth as great.
47°
35°
20°
25°
22. Two bar magnets are placed on a table end to end, and they are allowed to swivel freely about their centers. Which describes the arrangement they form?
They form a T shape, meaning they are oriented perpendicularly to each other.
They align so that the north pole of one magnet faces the south pole of the other magnet.
They align so the two south poles face each other.
They align so the two north poles face each other.
It is eight times as great.
It is the same.
It is four times as great.
It is one-fourth as great.
0.94 T.Explanation / Answer
The magnitude of the induced end is directly proportional to the number of turns.
The induced emf increases by a factor that is the ratio of final number of turns to the initial number of turns.
That is 8/2 =4.
Four times as a great.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.