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The magnetic field inside a toroidal sol...

The magnetic field inside a toroidal solenoid of radius R is B . If the current through it is doubled and the radius is also doubled keeping the number field produced by it will be ______ .

A

4 B

B

B

C

`(B)/(2)`

D

`(B)/(4)`

Text Solution

Verified by Experts

The correct Answer is:
B
B = `mu _(0)` NI/2`pi` r , when current and radius is doubled the magnetic field remains unchanged.
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