Question

The current in an ideal, long solenoid is varied at a uniform rate of

0.01 \mathrm{~As}^{-1}

. The solenoid has 2000 turns/m and its radius is

6.0 \mathrm{~cm}

.

(a) Consider a circle of radius

1.0 \mathrm{~cm}

inside the solenoid with its axis coinciding with the axis of the solenoid. Write the change in the magnetic flux through this circle in 2.0 seconds.

(b) Find the electric field induced at a point on the circumference of the circle.

(c) Find the electric field induced at a point outside the solenoid at a distance

8.0 \mathrm{~cm}

from its axis.

Accepted Answer

(a) $1.6 	imes 10^{-8}$ weber; (b) $1.2 	imes 10^{-7} \mathrm{~V} \mathrm{~m}^{-1};$ (c) $5.6 	imes 10^{-7} \mathrm{~V} \mathrm{~m}^{-1}$

Answer

(a) $1.6 	imes 10^{-8}$ weber; (b) $2.1 	imes 10^{-7} \mathrm{~V} \mathrm{~m}^{-1};$ (c) $5.6 	imes 10^{-7} \mathrm{~V} \mathrm{~m}^{-1}$

Answer

(a) $4.6 	imes 10^{-8}$ weber; (b) $1.2 	imes 10^{-14} \mathrm{~V} \mathrm{~m}^{-1};$ (c) $6.5 	imes 10^{-2} \mathrm{~V} \mathrm{~m}^{-1}$

Answer

(a) $1.6 	imes 10^{-4}$ weber; (b) $1.2 	imes 10^{-7} \mathrm{~V} \mathrm{~m}^{-1};$ (c) $0.5 	imes 10^{-14} \mathrm{~V} \mathrm{~m}^{-1}$

NEET UG PHYSICS MCQ: ELECTRO MAGNETIC INDUCTION

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