What is the rule of the resistance?

The resistance of conductor is directly proportional to the length of the conductor. Greater is the length of conductor greater will be the resistance, similarly smaller is the length, and smaller will be the resistance of the conductor.

What are the four laws of resistance?

The following are the main laws of resistance: (i) Resistance of a conductor is directly proportional to its length, provided temperature and other physical conditions remain unchanged. (ii) Resistance of a conductor is inversely proportional to its area of cross section, other conditions remaining the same.

What is the law of resistance in series?

The same current flows through each part of a series circuit. The total resistance of a series circuit is equal to the sum of individual resistances. Voltage applied to a series circuit is equal to the sum of the individual voltage drops.

What does Joule’s law state?

noun Physics. the principle that the rate of production of heat by a constant direct current is directly proportional to the resistance of the circuit and to the square of the current. the principle that the internal energy of a given mass of an ideal gas is solely a function of its temperature.

What are the law of combination of resistance?

According to the law of combination of resistance in parallel , the reciprocal of the combined resistance of a number of resistances connected in parallel is equal to the sum of the reciprocals of all the individual resistances.

What law does v IR represent?

Ohm’s law states that the voltage or potential difference between two points is directly proportional to the current or electricity passing through the resistance, and directly proportional to the resistance of the circuit. The formula for Ohm’s law is V=IR.

What can Joule’s law predict?

Joule’s law, in electricity, mathematical description of the rate at which resistance in a circuit converts electric energy into heat energy. He determined that the heat evolved per second is equivalent to the electric power absorbed, or the power loss.

Why is Joule’s law important?

Joule’s Law is an equation that gives the amount of heat (energy) delivered to something. It would seem sensible to assume that it’s the amount of heat delivered to the weld. However, it is important to consider all the factors in the equation: Current, Voltage, and Time.

What is the law of combination of series?

According to the law of combination of resistances in series, the combined resistance of any number of resistances connected in series is equal to the sum of the individual resistances.

Why is the series arrangement not used for domestic circuits?

In series circuits voltage is divided. Each component of a series circuit receives a small voltage so the amount of current decreases and the device becomes hot and does not work properly. Hence, the series arrangement is not used in domestic circuits.