Question

The power supply for your answering machine is a small black cube that plugs directly into an electric outlet. The main component in this supply is a transformer and a moderate current from the 120-volt power line flows through the primary coil of this transformer. If the transformer’s primary coil has 20 times as many turns of wire in it as the secondary coil has, then the secondary coil provides:(A) a large voltage rise for the large amount of current that flows through it. (B) a small voltage rise for the large amount of current that flows through it. (C) a small voltage rise for the small amount of current that flows through it. (D) a large voltage rise for the small amount of current that flows through it.

Answer 1

If the transformer’s primary coil has 20 times as many turns of wire in it as the secondary coil has, then the secondary coil provides a small voltage rise for the large amount of current that flows through it.

Answer: Option B

Explanation:

A transformer has a two types of coils, the first one is primary coils and the second one is secondary coil. A secondary coils with hardly any turns in it provides the charges going through it just limited quantities of energy.

Without a long separation over which to do chip away at the charges streaming in the loop, the transformer delivers just a little ascent in the voltage of those charges. Be that as it may, the coil can give this little voltage to ascend to a huge current without requiring an excess of power supply from the input circuit.