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Wednesday, 5 June 2013

Choose the correct option. The magnetic field inside a long straight solenoid-carrying current (a) is zero

Q. No 3: Choose the correct option.
The magnetic field inside a long straight solenoid-carrying current
(a) is zero
(b) decreases as we move towards its end
(c) increases as we move towards its end
(d) is the same at all points

Ans: (d) The magnetic field inside a long straight current-carrying solenoid is uniform which is represented by parallel lines. Hence it is same at all points.

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