Faraday's Law and AC Generators

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What principle does an AC generator use?

Newton's law of motion

Archimedes' principle

Coulomb's law

Faraday's electromagnetic induction law (correct)

In an AC generator, when is the flux linking with the coil zero?

When the coil is along XX' (perpendicular to the lines of flux)

When the coil is making an angle θ with respect to XX'

When the coil is along YY' (parallel to the lines of flux) (correct)

When the coil is at its maximum angular velocity

What is the equation for alternating induced EMF according to Faraday's law of electromagnetic induction?

$E = N\omega\phi_m$ (correct)

$E = \frac{N^2\phi}{\omega}$

$E = \frac{N\phi}{\omega}$

$E = N\omega^2\phi_m$

What does the symbol 'N' represent in the context of an AC generator?

Number of turns of coil Signup and view all the answers

When does the flux linking with the coil equal to its maximum value, ϕm?

When the coil is along XX' (perpendicular to the lines of flux) Signup and view all the answers

What does 'A' represent in the context of an AC generator?

Area of coil Signup and view all the answers

What is the definition of waveform?

The graph between magnitude of alternating quantity against time Signup and view all the answers

What does the RMS value of an alternating current represent?

The equivalent DC current which produces the same heat as the alternating current Signup and view all the answers

What is the power factor?

The cosine of the angle between voltage and current Signup and view all the answers

What is the time period in an AC circuit?

The time taken to complete one cycle Signup and view all the answers

What does the amplitude of a waveform represent?

The maximum value attained by an alternating quantity in one cycle Signup and view all the answers

What is the frequency in an AC circuit?

The number of cycles completed per second Signup and view all the answers

What is the instantaneous value of a current?

The value of current at a particular instant of given time Signup and view all the answers

8

Sine Wave Signup and view all the answers

In an electrical circuit Vrms stands for

voltage/ Root Mean Square Value of Voltage Signup and view all the answers

Faraday's Law and AC Generators

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