TN Phy, Unit - 4, Electromagnetic Induction And Alternating Current

                        Welcome To

Class : XII

Subject : Physics

Unit : 4

Unit Name : Electromagnetic Induction And Alternating Current

IMPORTANT QUESTIONS

2 Marks

1. State Fleming’s right hand rule.

2. Mention the ways of producing induced emf.

3. Define electric resonance.

4. How will you define Q-factor?

3 Marks

1. How will you induce an emf by changing the area enclosed by the coil?

2. Mention the various energy losses in a transformer.

3. Find out the phase relationship between voltage and current in a pure resistive circuit.

 

4. Assuming that the length of the solenoid is large when compared to its diameter, find the equation for its inductance.

5 Marks

1. Show mathematically that the rotation of a coil in a magnetic field over one rotation

induces an alternating emf of one cycle.

2. Explain the construction and working of transformer.

3. Find out the phase relationship between voltage and current in a pure inductive circuit.

4. Derive an expression for phase angle between the applied voltage and current in a series RLC circuit.

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