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Magnetic Field Due to a Circular Ring on the Axis

A tangent gal...

Question

A tangent galvanometer is connected directly to an ideal battery. If the number of turns in the coil is doubled, the deflection will

A

increase

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B

decrease

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C

remain unchanged

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D

either increase or decrease

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Solution

The correct option is A decrease
$I = \frac{C}{N B A} ϕ$

If the turns increased, the delection will decrease.

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