Question 89: Electromagnetic Induction

Question

A metallic conductor of length 1 m rotates in a vertical plane parallel to east-west direction about one of its end with angular velocity 5 rad s$$-$$1. If the horizontal component of earth's magnetic field is 0.2 $$	imes$$ 10$$-$$4 T, then emf induced between the two ends of the conductor is :

Accepted Answer

$$Emf = {1 \over 2}B\omega {l^2}$$
$$ = {1 \over 2} 	imes 0.2 	imes {10^{ - 4}} 	imes 5 	imes {1^2}$$ V
= 0.5 $$	imes$$ 10
$$-$$4
V
= 50 $$\mu$$V

Answer

5 $$\mu$$V

Answer

50 $$\mu$$V

Answer

5 mV

Answer

50 mv

Electromagnetic Induction

A metallic conductor of length 1 m rotates in a vertical plane parallel to east-west direction about one of its end with angular velocity 5 rad s$-1. If the horizontal component of earth's magnetic field is 0.2 \times 10-$4 T, then emf induced between the two ends of the conductor is :

Choose the correct answer: