Question

Find the potential difference required to pass a current of 0.2A in a wire of resistance 20 ohm

Answer 1

4V

Step-by-step explanation:

Ohm's law gives that V = I R, that is, potential difference = current x resistance.

We have the current and resistance given to us in the question, so multiply these together to get the potential difference: 0.2 x 20 = 4V

Answer 2

• Potential difference is of 4V.

Step-by-step explanation :

Here we would be using Ohm's Law to calculate the potential difference required to pass a current of 0.2A in a wire of resistance 20 ohm.

★ Ohm's law :-

• V = IR

Here,

• V is potential difference
• I is current
• R is resistance

We have :

• I = 0.2A
• R = 20Ω

Substituting the values :

> V = 0.2 × 20

> V = (2 / 10) × 20

> V = 2 × 2

> V = 4