Question

In answering the questions below, consider the transformer ideal unless otherwise noted. (Figure 1) Part A The primary coil of a transformer contains 100 turns; the secondary has 200 turns. The primary coil is connected to a size AA battery that supplies a constant voltage of 1.5 volts. What voltage would be measured across the secondary coil?

Answer 1

Classic trick question. The voltage on the secondary side would be zero because the battery supplies direct current. Transformers require alternating current to operate.