GEOLOGY

Detailed explanation-1: -A transformer is a device used in the power transmission of electric energy. The transmission current is AC. It is commonly used to increase or decrease the supply voltage without a change in the frequency of AC between circuits.

Detailed explanation-2: -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.

Detailed explanation-3: -A transformer is a device that increases or decreases the voltage and current of two linked AC circuits.

Detailed explanation-4: -A transformer that increases the voltage from primary to secondary (more secondary winding turns than primary winding turns) is called a step-up transformer. Conversely, a transformer designed to do just the opposite is called a step-down transformer.

Detailed explanation-5: -A step-down transformer is used to decrease the voltage in electrical power supply.