Question

the potential difference required to pass current 0.2A in a wire of resistance 20 ohms is

Answer 1

Answer:

4 Volt

Explanation:

According to the given question,

I = current = 0.2 Amp

R = Resistance = 20 ohm

V = Potential difference

And we are asked to find potential difference or volatge.

We know,

• From ohm's law, V = IR

Putting the values we get,

• V = 0.2× 20

• V = 2×2

• V = 4 Volt

Thus potential is 4V when 0.2 A of current is passing through wire of 20 ohm resistance.

Answer 2

Solution :-

As given

Resistance of wire = 20 Ω

Required current to pass through

= 0.2A

Now as we know that from ohms law

V ∝ I

V = potential difference between two points in a circuit . SI unit = Volt (V)

I = Current in the circuit . SI unit = Ampers (A)

And the proportionality constant is "R"

R = Resistance of the conducting wire . SI unit = Ohm (Ω)

∴ V = IR

So as

R = 20 Ω

I = 0.2 A

V = IR

→ V = 0.2 × 20

→ V = 4 V