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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACMotional & Rotational EMFEasy2 minPYQ_2020

PhysicsEasysingle choice

$AB$ is a resistance less conducting rod which forms a diameter of a conducting ring of radius $r$ rotating in a uniform magnetic field $B$ as shown in the diagram. The resistors $R_{1}$ and $R_{2}$ do not rotate. Then the current through the resistor $R_{1}$ is

Options:

Answer:

Solution:

The equivalent diagram is

The induced emf across the centre and any point on the
circumference is

$|\vec{e}| = \frac{1}{2} B ω ℓ^{2} = \frac{B ω r^{2}}{2}$

∴ Current through $R_{1} = \frac{B ω r^{2}}{2 R_{1}}$

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

⏱ 2mℹ️ Source: PYQ_2020

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