Question

Potential difference between A and C is: (a) 55 V (b) 0.55 V (c) 550 V (d) 5.5 V​

Answer 1

The correct option to the above question is (d), which is 5.5V

Given: Two cells of emf = 5V, 6V

           The internal resistance of the cells = 3Ω, 2Ω

           The external resistance of the circuit = 5Ω

To find: Potential difference between A and C

Solution:

Total resistance of the circuit = 3 + 2 + 5 = 10Ω

Since the negative pole of one cell is attached to the positive pole, therefore the total potential difference in the circuit is the sum of both the cells = 5 + 6 = 11V

The current in the circuit will be potential difference/resistance.

I = V/R

 = 11/10 = 1.1A

The potential difference between points A and C will be $V_{A}$ - $V_{C}$

= 5×1.1 - 0

= 5.5V

The potential difference between points A and C will be 5.5V

• The potential difference also known as the voltage is the difference in the amount of energy that charge carriers have between two points in a circuit.