1. Electrical resistivity

Also known as resistance coefficient or specific resistance. It is a physical quantity that measures the electrical conductivity of a substance, expressed in the letter rho, in ohms * millimeters square per meter. In terms of numerical value, it is equal to the resistance value of a wire with a length of 1 meter and a cross-sectional area of 1 square millimeter made of that substance at a temperature of 20C. The higher the resistivity, the lower the conductivity. The physical quantity that changes the electrical resistivity of a substance with temperature, whose value is equal to the ratio of the increase in electrical resistivity to the original electrical resistivity for every 1C increase in temperature, usually represented by the letter α, in units of 1/C.

2. Temperature coefficient of resistance

A physical quantity that represents the variation of the electrical resistivity of a substance with temperature. Its value is equal to the ratio of the increase in electrical resistivity to the original resistivity for every 1C increase in temperature. It is usually represented by the letter alpha and is expressed in units of 1/C.

3. Conductivity

-The ability of an object to conduct electric current is called conductivity. In a DC circuit, the value of conductivity is the reciprocal of the resistance value, represented by the letter ō, in ohms.

4. Conductivity

Also known as conductivity coefficient, it is a physical quantity that measures the conductivity of a substance. Size is the reciprocal of electrical resistivity in numerical terms, expressed in the letter gamma, in meters/ohms * millimeters square.

5. Electromotive force

The potential difference caused by the conversion of other forms of energy into electrical energy in a circuit is called electromotive force or simply electromotive force. Represented by the letter E, in volts.

6. Self perception

When the current in a closed circuit changes, the magnetic flux generated by this current passing through the circuit itself also changes. Therefore, an induced electromotive force is also induced in the circuit, which is called self induction phenomenon. This induced electromotive force is called self induction electromotive force.

7. Mutual inductance

If two coils are close to each other, a portion of the magnetic flux generated by the current in * * coils is linked to * * coils. When the current in the * * coil changes, its magnetic flux with the * * coil loop also changes, generating induced electromotive force in the * * coils. This phenomenon is called mutual inductance.