What is solenoid?
Solenoid is a cylindrical coil of wire which creates a magnetic field like a
bar magnet when electricity flows in it.
Why step-up transformer is used to transfer current for long distance?
When current flows through a resistance, heat is generated and this is the
loss fo electrical energy. This loss is called system loss. If electricity is
supplied at high voltage then for definite electrical energy, the loss is
reduced because of resistive heat energy. That’s why Electricity produced in
the power plants is transformed into high voltage using step-up transformers.
Before distributing the electricity produced in the power plants in
transformers. Before distributing the electrical energy for customer use, the
electrical energy for customer use, the electrical supply is again brought
down to a suitable voltage using a step-down transformer. Thus this helps to
reduce the system loss.
