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Standard XII

Mathematics

Definition of Functions

Assertion :A ...

Question

Assertion :A step up transformer can also be used as a step down transformer. Reason: This is because $\frac{E_{p}}{E_{s}} = \frac{n_{s}}{n_{p}}$

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

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

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is C Assertion is correct but Reason is incorrect
Equation for transformer is
$\frac{E_{p}}{E_{s}} = \frac{n_{p}}{n_{s}}$ hence reason is wrong.
The answer is correct but the reason is wrong.

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Assertion :A step up transformer can also be used as a step down transformer. Reason: This is because EpEs=nsnp

The correct option is C Assertion is correct but Reason is incorrectEquation for transformer is EpEs=npns hence reason is wrong.The answer is correct but the reason is wrong.

Assertion :A step up transformer can also be used as a step down transformer. Reason: This is because $\frac{E_{p}}{E_{s}} = \frac{n_{s}}{n_{p}}$

The correct option is C Assertion is correct but Reason is incorrect
Equation for transformer is
$\frac{E_{p}}{E_{s}} = \frac{n_{p}}{n_{s}}$ hence reason is wrong.
The answer is correct but the reason is wrong.