Question

An electric heater conducts 4A current when 60v is applied across its terminals what will be the current of the potential difference is 120V?​

Answer 1

Answer :-

Required amount of current is 8 A .

Explanation :-

We have :-

→ Current = 4 A

→ 1st Potential difference = 60 V

→ 2nd Potential difference = 120 V

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According to Ohm's Law, we know that :-

V = IR

Where :-

• V is potential difference.

• I is current.

• R is resistance.

Firstly, let's calculate resistance of the heater :-

⇒ 60 = 4 × R

⇒ R = 60/4

⇒ R = 15 Ω

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Now, current when 2nd potential difference is applied :-

⇒ V = IR

⇒ 120 = I × 15

⇒ I = 120/15

⇒ I = 8 A

Answer 2

Given :-

An electric heater conducts 4A current when 60v is applied across its terminals

To Find :-

Current

Solution :-

We know that

R = V/I

R = 60/4

R = 15 Ω

Now

I = V/R

I = 120/15

I = 8 A