Question

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Answer 1

$\large{\underline{\underline{\sf{\blue{Required \: Answers-}}}}}$

$\star \: {\underline{\boxed{\sf{Electric \: Generator}}}}$

The device which converts mechanical energy into electrical energy is termed as Electric Generator.

Mechanical energy is used here to rotate current carrying coul in a magnetic field around the axle & thereby produces electricity.

Charles F. Brush was the first person to invent Electric Generator.

$\star \: {\underline{\boxed{\sf{Principle}}}}$

Electric Generator works on the principle of Electromagnetic Induction which is invented by Michael Faraday.

Coil of an electric generator rotates in magnetic field, a current is induced in the coil.

This induced current flows in the circuit connected to the coil.

$\star \: {\underline{\boxed{\sf{Construction}}}}$

Figure provided in attachment shows construction of an Electric Generator. Here, a coil ABCD of copper wire is kept between the two poles of magnet.

Ends of coil are connected to conducting rings $\sf{R_1}$ & $\sf{R_2}$ through carbon brushes.

Rings are fixed to axle & there is resistive coating in between rings & axles. Galvanometer used here is to show the direction of current in circuit.

$\star \: {\underline{\boxed{\sf{Working}}}}$

When axle is rotated, coil ABCD starts rotating. According to Fleming's right hand rule, the induced current flows in direction A $\longrightarrow$ B $\longrightarrow$ C $\longrightarrow$ D in external circuit.

Induced current is proportional to no. of turns of copper wire in coil. After half rotation, AB & CD interchange their places. Hence, induced current flows in direction of D $\longrightarrow$ C $\longrightarrow$ B $\longrightarrow$ A.

Thus, direction of current is external circuit opposite to that in previous half rotation. The process goes on repeating & alternating current is generated.

Answer 2

Electric Generator

• The device which converts mechanical energy into electrical energy is termed as Electric Generator.

• Mechanical energy is used here to rotate current carrying coul in a magnetic field around the axle & thereby produces electricity.

• Charles F. Brush was the first person to invent Electric Generator.

Principle

• Electric Generator works on the principle of Electromagnetic Induction which is invented by Michael Faraday.

• Coil of an electric generator rotates in magnetic field, a current is induced in the coil.

• This induced current flows in the circuit connected to the coil.

Construction

• construction of an Electric Generator. Here, a coil ABCD of copper wire is kept between the two poles of magnet.

• Rings are fixed to axle & there is resistive coating in between rings & axles. Galvanometer used here is to show the direction of current in circuit.

Working

• When axle is rotated, coil ABCD starts rotating. According to Fleming's right hand rule, the induced current flows in direction A ⟶ B ⟶ C ⟶ D in external circuit.

• Induced current is proportional to no. of turns of copper wire in coil. After half rotation, AB & CD interchange their places. Hence, induced current flows in direction of D ⟶ C ⟶ B ⟶ A.
• Thus, direction of current is external circuit opposite to that in previous half rotation. The process goes on repeating & alternating current is generated.

$\large\boxed{\fcolorbox{pink}{ink}{Hope \: it \: helps \: uh \: !!}}$