Question

In an electric circuit the current is 0.5 A when a potential difference of 6 V is applied. When a potential difference of 12V is applied across the same circuit, the current will be :

• A. 0.25 A
• B. 0.5 A
• C. I A
• D. 2 A

Answer 1

Answer:

C. I A

Based on Ohm's Law (V=IR), the resistance of the circuit can be calculated using the initial values.

First, let's find the resistance (R):

• R=I1​V1​​

• R=0.5 A6 V​=12Ω

Since the resistance of the circuit remains the same, we can use this value to find the new current (I2​) when the potential difference is 12 V:

• I2​=RV2​​

• I2​=12Ω12 V​=1 A

The current will be 1 A when a potential difference of 12 V is applied.