Q.

The magnetic field inside a long straight solenoid-carrying current __________.

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a

decreases as we move towards its end

b

is same at all points

c

is zero

d

increases as we move towards its end

answer is D.

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Detailed Solution

The magnetic field inside a long straight solenoid-carrying current is same at all points. It is because the magnetic field in the solenoid is constant because the lines are completely parallel to each other.

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