State ohm‟s law. Represent it graphically. In the given circuit diagram calculate
(i) the total effective resistance of the circuit. (ii) the current through each resistor.
Answers
It is the basic, foremost and significant law that explores the relationship between voltage, current and resistance in an electric circuit. It states that, at constant temperature the current flowing through the circuit is directly proportional to the voltage or potential difference across that circuit.
In algebraic form, V∝ I
V = IR
Where
I is the current flowing through the circuit and it is measured in Amps
V is the voltage applied across the circuit and it is measured in Volts
And R is the proportionality constant, called as Resistance which is measured in Ohms.
This resistance is also specified in kilo Ohms, Mega Ohms, etc.
Therefore, ohm’s law tells that current flow in circuit is directly proportional to the voltage and is inversely proportional to the resistance in that circuit. Ohm’s law can be applied to the individual parts or to an entire circuit.Mathematically, Current, I = V/R
Voltage, V = IR
Resistance, R = V/I
The potential difference across the ends of a resistors is directly proportional to the current through it, provided its temperature remains the same