Conductor wire ABCDE with each arm 10 cm in length is placed in magnetic field of Tesla, perpendicular to its plane. When conductor is pulled towards right with constant velocity of 10 cm/s, induced emf between points A and E is ______ mV. [2025

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Solution

Q.
Conductor wire ABCDE with each arm 10 cm in length is placed in magnetic field of $\frac{1}{\sqrt{2}}$ Tesla, perpendicular to its plane. When conductor is pulled towards right with constant velocity of 10 cm/s, induced emf between points A and E is ______ mV. [2025]

Ans.
(10)

As field is uniform, we can replace the bent wire with straight wire from A to E. EMF $ε = B v l$

$ε = \frac{1}{\sqrt{2}} \times \frac{10}{100} \times \frac{2 (10 \sin 45 °)}{100} = 0.01 V = 10 mV$

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