EM Induction & Alt Current Test

Result

EM Induction & Alt Current Test - 2

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Question 1
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If we hold a strong permanent magnet inside a metal ring and then quickly remove that magnet, we create an electric field in the metal ring and an electrical current flows through the metal ring. If we repeat this procedure with a glass ring, then no current flows in the glass ring because

A
the glass ring creates its own magnetic field in the opposite direction, opposing the field of the permanent magnet and preventing any current flow

B
although removing the magnet creates an electric field in the glass ring, the glass ring has no mobile electric charges to carry an electrical current

C
removing the magnet from the glass ring does not create an electric field

D
the glass ring is made of a non-magnetic material. No magnetic fields can be present inside the ring so removing the magnet has no effect on the ring.

Solution

The glass ring has no mobile electric charges to carry an electrical current.