Why is the primary coil made of thin wire and the secondary coil of thick wire?
A voltage change from primary to secondary will mean a current change also. If the voltage is increased the current will be decreased and vice versa. … Bigger currents need thicker wire and so step down transformers have primary coils of thin wire and secondary coils of thick wire.
Why copper wire is usually used for the coils of a transformer?
Copper is the material of choice for power transformer conductors due to its superior short-circuit withstand capabilities. It is a basic principle of electromagnetic induction that an electric current flows in a closed coil placed within a varying magnetic field.
Why thick wires are used in secondary of step down transformer?
A step down transformer is designed as there are more turns on the primary coil than the secondary coil. … The voltage will be higher in the secondary coil so there is a chance for more loss. So, to reduce the temperature we use thicker wires having low resistivity.
What is the effect of a thicker wire is used in the coil Why?
The thin wire will conduct electricity, but there is more electrical resistance. The thicker wire is like the four lane highway. There’s a lot less electrical resistance, and as a result, that light bulb burns brighter because more electricity can reach it.
Why primary coil is thicker than secondary coil in step up transformer?
In a step-up transformer, the primary coil is made of thicker wire. This is because in a step-up transformer the number of turns in the secondary coil is more than the number of turns in the primary coil. … Therefore, one must use a thicker wire in the primary coil as compared to that in the secondary coil.
What is the purpose of coil?
The purpose of the coil is to achieve resonance, which occurs when the primary coil passes current into the secondary coil. When electricity passes through a circuit, it flows through a resistor and into an electric coil. An electric coil works to maintain stability and resists the flow of current, initially.
What is coil used for?
coil, in an electric circuit, one or more turns, usually roughly circular or cylindrical, of current-carrying wire designed to produce a magnetic field or to provide electrical resistance or inductance; in the latter case, a coil is also called a choke coil (see also inductance).
Which wire is thicker in step down transformer?
In a transformer the thicker wire is usually the one that carries a larger current. According to the simple formula relating the voltages and currents in a transformer V1I1=V2I2, you have the larger current at the lower voltage terminal.
Why are thick copper wires used as connecting wires?
The resistance of connecting wires should be almost negligible. For this thick wires are used . since a thicker wire has a small resistance and the wires are made of copper because the resistivity of copper is low.
Which transformer secondary winding is closed?
The secondary winding of a current transformer is always kept closed. Explanation: Current Transformers are build to have a very small turns ratio.