Question

In a step up transformer the turn ratio is $1:3.$ A Daniel cell of emf $1.5\text{V}$ is connected across the primary, the voltage across the secondary is-

• A. $13.5\text{V}$
• B. $4.5\text{V}$
• C. $7.5\text{V}$
• D. $0\text{V}$

Answer 1

The correct option is D $0\text{V}$

Daniel cell works as a d.c. power supply.

As we know, transformers only works in a.c. power supply, it will not work in d.c. power supply. Hence, voltage across the secondary will be zero.

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Hence, $\left(D\right)$ is the correct answer.