Question

answer this pls 25 or question ​

Answer 1

Answer:

could you please send me a clear photo??

Answer 2

Aim : To prove Faraday's Law of Electro magnetic Induction

Apparatus :

• Two coils
• Battery
• Switch
• Galvanometer
• Connecting wires.

Procedure:

• Two  circular coils A and B are placed by side close to each other .
• Coil A is connected to to battery and a switch S. where as Coil B is connected to galvanometer G.
• Let us pass current in Coil A by pressing the switch.

Observation:

• As soon  as we pass the current, the galvanometer attached to coil B deflects.
• This means that on switching on the current In coil A an electric current is induced in coil B momentarily.
• If current in Coil A is kept ON , nothing happens in Galvanometer of coil B.
• Let us now switch off the current, as soon as we switch off, galvanometer deflects but in opposite direction.
• If we keep on Switching On and Off the current in coil A rapidly, then pointer in galvanometer of coil B deflects rapidly moving on both the sides of zero mark.

Conclusion :

When ever current in the coil A is changing then an electric current is induced in near by Coil B . Coil A which causes induction is called as Primary coil whereas Coil B is called as Secondary Coil.

Reason:

when we switch On the current in coil A, it becomes electro magnet and produces a magnetic field  around coil B.

The effect is same as moving the bar magnet

when current is switch off in coil A, its magnetic field in coil B stops quickly. This effect is same as pulling a bar magnet away.

Thus current is induced in coil B by changing the magnetic field in it when current in Coil A and is switched On or OFF.