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Heating Effect of Current

Assertion A: ...

Question

Assertion (A): More the turns more is the
resistance
Reason(R): Impedance of primary and secondary
in a transformer is directly proportional to number
of turns in the coils.

A

Both Assertion and Reason are true and Reason is the correct explanation for Assertion

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B

Assertion and Reason are true but Reason is not the correct explanation for Assertion

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C

Assertion is true, Reason is false

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D

Assertion is false, Reason is true

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Solution

The correct option is C Assertion is true, Reason is false
More turns means length of wire is more. we know that
$R = \frac{ρ L}{A}$
So, more length more resistance.
Importance of primary and secondary in a transformer is directly proportional to square of numbers of turns in the case i.e. z X n2

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