Electromagnetic Induction and Alternating Current Physics - Electromagnetic Induction and Alternating Current

In an AC circuit containing only capacitance, the current-

The average power consumed by the choke coil over a complete cycle is …………….

A circuit will have flat resonance if its Q-value is …………….

Angular resonant frequency (co) is …………….

Voltage drop across inductor and capacitor differ in phase by …………….

Q-factor measures the …………….in the resonant circuit

What is meant by ‘Wattful current’?

Write down the applications of the series RLC resonant circuit.

Why dc ammeter cannot read ac?

A capacitor blocks DC but allows AC. Explain.

An inductor blocks AC but it allows DC. Why? and How?

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.
(c) If assertion is true but reason is false.
(d) If the assertion and reason both are false.
(e) If assertion is false but reason is true.
Assertion: In series LCR circuit resonance can take place.
Reason: Resonance takes place if inductance and capacitive reactances are equal and opposite.

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.
(c) If assertion is true but reason is false.
(d) If the assertion and reason both are false.
(e) If assertion is false but reason is true.
Assertion: An aircraft flies along the meridian, the potential at the ends of its wings will be the same.
Reason: Whenever there is a change in the magnetic flux, and emf is induced.

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.
(c) If assertion is true but reason is false.
(d) If the assertion and reason both are false.
(e) If assertion is false but reason is true.
Assertion: Inductance coil are made of copper.
Reason: Induced current is more in wire having less resistance.

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.
(c) If assertion is true but reason is false.
(d) If the assertion and reason both are false.
(e) If assertion is false but reason is true.
Assertion: Faraday’s laws are consequences of conservation of energy.
Reason: In a purely resistive AC circuit, the current lags behind the emf in phase.

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.
(c) If assertion is true but reason is false.
(d) If the assertion and reason both are false.
(e) If assertion is false but reason is true.
Assertion: Eddy currents is produced in any metallic conductor when flux is changed around it.
Reason: Electric potential determines the flow of charge.

What are LC oscillation? and explain the generation of LC oscillation.

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

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

How will you define the unit of mutual-inductance?

Derive an expression for Mutual Inductance between two long co-axial solenoids.