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STANDARD Physics Resistances in Series and Parallel MCQ Question

Type: MCQ-numerical-Medium-Class 12

In the circuit shown in the given figure, the resistances R₁ and R₂ are respectively

A

14 Ω and 40 Ω

B

40 Ω and 14 Ω

C

40 Ω and 30 Ω

D

14 Ω and 30 Ω

Correct Answer

Option A

Detailed Explanation

The potential difference across the 20 Ω resistor is 20 V, which is the same as across R₂. Using Ohm's law, R₂ = 20 V / 0.5 A = 40 Ω. The potential difference across R₁ is 69 V - 20 V = 49 V. Using Ohm's law, R₁ = 49 V / 3.5 A = 14 Ω.

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