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What is Electrical Resistance | Electrical Resistance Formula

Electrical resistance of an electrical conductor is the defined as: An electrical quantity which measure how conductor material reduces electric currant flow through it. Electrical resistance is measured in ohms (Ω).

What is Electrical Resistance?

Electrical resistance of an electrical conductor is the defined as:
An electrical quantity which measure how conductor material reduces electric currant flow through it.
Electrical resistance is measured in ohms (Ω).


Electrical resistance formula:



By ohm's law R is equal to V divided by I where,

R is the resistor's resistance in Ohms (Ω).
V is the voltage drop on resistor in Volts (V).
I  is the current of resistor in amperes (A).

Resistance in Series:

In series circuit total resistance of the circuit is equal to the sum of all resistance connected.
And the formula of resistance in series is:
RTotal = R1R2R3+...
In series circuit current will be same in every resistor and voltage accross the circuit is the sum of voltage across the each component.

Resistance in Parallel:

In parallel circuit total resistance formula used is:
RTotal = 1/R1+ 1/R2+ 1/R3+...
As circuit shown in parallel circuit current will be divided through each resistor and voltage will apply same on each resistor.

Resistivity and conductivity:

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