What will be the value of current (in A) through a resistor of 40 Ohms when the potential difference between two ends of the resistor is 20 V?

What will be the value of current (in A) through a resistor of 40 Ohms when the potential difference between two ends of the resistor is 20 V? Correct Answer 0.5

Ohm’s law: Ohm’s law states that at a constant temperature, the current through a conductor between two points is directly proportional to the voltage across the two points.

Voltage = Current × Resistance

V = I × R

V = voltage, I = current and R = resistance

The SI unit of resistance is ohms and is denoted by Ω.

It helps to calculate the power, efficiency, current, voltage, and resistance of an element of an electrical circuit.

It an element follows the ohm’s law, then the element is known as a linear element.

Ex: Resistor

Calculation:

Given that, resistance (R) = 40 Ω

Potential difference (V) = 20 V

From Ohm’s law, V = IR