30. Induction and Inductance

A transformer is a device used to:

Which of the following is a likely symptom of a transformer with an open circuit in its secondary winding?

Which statement best explains how a step-down transformer makes electricity safe for use in homes?

Which of the following is a characteristic of a step-up transformer?

In an electrical power distribution system, a step-down transformer is typically located in which part of the circuit?

In a conventional transformer, the two windings are known as the:

Which quantity does a transformer primarily change in an electrical circuit?

Which parameter determines whether a transformer is classified as step-up or step-down?

Transformers are rated using which of the following quantities?

Why does a transformer require $\mathrm{AC}$ (alternating current) to operate effectively?

Three ideal transformers A, B, and C have the same primary voltage but different turns ratios: transformer A has a turns ratio of $\frac{N{s}_A}{N{p}_A}$ = $2$, transformer B has $\frac{N{s}_B}{N{p}_B}$ = $1$, and transformer C has $\frac{N{s}_C}{N{p}_C}$ = $0.5$. Rank the transformers in order of decreasing rms secondary voltage.

Which of the following statements about transformers is correct?

In a transformer, what is the primary cause of voltage being induced in the secondary coil?

Which device is used to transfer $\mathrm{AC}$ from one electric circuit to another by electromagnetic induction?

How are step-up transformers used in the transmission of electrical energy over long distances?