Which of the following devices is associated with alternating currents only?
A.
Step-up transformer
B.
Induction coil
C.
Moving coil galvanometer
D.
Lead-acid accumulator
Correct answer is A
The device associated with alternating currents (AC) only from the provided options is the step-up transformer. Step-up transformers are specifically designed to work with alternating currents and are used to increase voltage levels in AC systems.
