Question

An activity demonstrate the phenomenon of elecrtic magnetic induction by moving a magnet near the solenoid

Answer 1

When a magnet is moved into a coil of wire, changing the magnetic field and magnetic flux through the coil, a voltage will be generated in the coil according to Faraday's Law. ... Thepolarity of the induced emf is such that it produces a current whose magnetic field opposes the change that produces it.

Answer 2

Answer:

A solenoid is a long cylindrical coil of wire that acts like a magnet when current  is flowing through it.

An experiment to demonstrate the magnetic effect of a solenoid is as follows

Aim - To test the magnetic effect of a solenoid.

Materials required – a long length of copper wire, a simple circuit, mariner’s compass.

Method – i) Wind the length of copper wire around a cylindrical object around 20-25  times.

ii) Remove the cylindrical object carefully leaving behind only the coiled wire.

iii) Connect this coil to a simple circuit.

iv) Place a mariner’s compass near the circuit and observe if the needle is deflected.

v) Increase the distance between the circuit and the compass to see how far the  magnetic effect extends.

Observation – It is observed that when the mariner’s compass is placed near the circuit

the needle shows deflection. When the distance between the circuit and compass is  increased the magnetic effect is decreased.

Explanation: