## Related questions with answers

A transformer has 22 turns of wire in its primary and 88 turns in its secondary. Is this a step-up or step-down transformer?

Solutions

VerifiedRecall that in a $\textbf{step-up transformer}$, the number of coils in the secondary is greater than that in the primary. $\textbf{Step-down transformers}$, on the other hand, have a lesser number of coils in the secondary than the primary.

It is step-up transformer, as the number of turns in the secondary coil are higher than the primary coil the emf in the secondary coil will be higher than the primary coil. You can see this by interpreting transformer equation:

$V_{2} = N_{2}/N_{1} \times V_{1}$

where, $V_{2}$ is induced emf in secondary

$N_{2}$ is number of turns in secondary

$N_{1}$ is number of turns in primary

$V_{1}$ is applied emf in primary

In our case, $N_{2} > N_{1}$ Thus, $V_{2} > V_{1}$

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