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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACMotional & Rotational EMFEasy2 minPYQ_2020

PhysicsEasysingle choice

A metal disc of the radius $100 cm$ is rotated at a constant angular speed of $60 rad s^{- 1}$ in a plane at right angles to an external field of magnetic induction $0.05 Wb m^{- 2}$ . The emf induced between the centre and a point on the rim will be

Options:

Answer:

Solution:

Induced EMF = $\int_{0}^{R} B \times w \times r \times d r = B \times w \times \frac{R^{2}}{2}$

$= \frac{1}{2} \times 0.05 \times 60 \times 1^{2}$

$= \frac{6}{4} = 1.5 V$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:EMI/ACSubtopic:Motional & Rotational EMF

⏱ 2mℹ️ Source: PYQ_2020

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