Electromagnetic Induction (HSC SSCE Physics): Quizzes

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Magnetic Flux
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What does magnetic flux measure?

Magnetic field passing through an area

What is the formula for magnetic flux?

Φ=BAcosθ\Phi = BA\cos\theta

What is the SI unit of magnetic flux?

Weber (Wb)

When is magnetic flux through an area at maximum?

When θ=0°\theta = 0° (field \perp to area)

When is magnetic flux through an area equal to zero?

When θ=90°\theta = 90° (field \parallel to area)

What does θ\theta represent in the flux formula Φ=BAcosθ\Phi = BA\cos\theta?

Angle between field and normal to area

Which of these will NOT change magnetic flux?

Changing the material of the loop

If B=0.24 TB = 0.24\text{ T} and A=0.050 m2A = 0.050\text{ m}^2 with θ=0°\theta = 0°, what is Φ\Phi?

1.2×102 Wb1.2 \times 10^{-2}\text{ Wb}

Is magnetic flux a scalar or vector quantity?

Scalar (magnitude only)

What does a straight line on a flux vs time graph indicate?

Constant rate of change of flux

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