Question

Question 3

Attaching a coil of wire toa galvanometer and
(A quickly disconnecting the coil causes electrons to flow
(B moving a magnet in and out of the coil cancels electron flow
C mnoving a magnet into the
coil causes the needle of the galvanometer to move
D slowly inserting a magnet into the coil produces rapid needle movement on the meter
Last saved 8:34:50 AM

Answer 1

Attaching a coil of wire to a galvanometer and interacting with a magnet can induce electron flow and cause movement of the galvanometer needle.

Step-by-step explanation:

The subject of this question is Physics.

• A quickly disconnecting the coil causes electrons to flow because the changing magnetic field induces a current in the wire according to Faraday's law of electromagnetic induction.
• Moving a magnet in and out of the coil cancels electron flow because the changing magnetic field induces a current in one direction as the magnet enters the coil, and induces a current in the opposite direction as the magnet exits the coil, resulting in no net flow of electrons.
• Moving a magnet into the coil causes the needle of the galvanometer to move because the changing magnetic field induces a current in the wire according to Faraday's law of electromagnetic induction.
• Slowly inserting a magnet into the coil produces rapid needle movement on the meter because the gradual change in magnetic field induces a stronger current in the wire, leading to a more pronounced movement of the galvanometer needle.

Learn more about Electromagnetic induction