# GEOLOGY

## EARTH SCIENCE

### MAGNETISM

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Before electric current enters your home, a(n) ____ transformer ____ the voltage of the current to 120 V.
 A step-up, increase B step-down, decrease C step-up, decrease D step-down, increase
Explanation:

Detailed explanation-1: -Without it, the current entering your home would have too much voltage for your home’s electric circuits to handle.

Detailed explanation-2: -Step-up transformers increase the voltage of the incoming current, while step-down transformers decrease the incoming current’s voltage. The incoming voltage is referred to as the primary voltage, while the outgoing stream is referred to as secondary.

Detailed explanation-3: -Step-down transformers are used to decrease the voltage incoming to the site by increasing the electrical current. It does this by converting the high incoming voltage in the primary winding to the necessary lower voltage in the secondary windings.

Detailed explanation-4: -Transformers step up (increase) or step down (decrease) AC voltage using the principle of electromagnetic induction-mutual induction. A changing current in the primary coil induces an e.m.f in the secondary.

There is 1 question to complete.