CUET · PHYSICS · PYQ PAPER 2025
In a Wheatstone bridge, the resistances \( R_1, R_2, R_3 \) and \( R_4 \) present in four arms are \( 10 \Omega, 30 \Omega, 30 \Omega \) and \( 90 \Omega \) respectively. If the galvanometer resistance is \( 50 \Omega \) and the voltage of the battery is 7 V and its internal resistance is \( 5 \Omega \), then the total current drawn from the battery is
- A 1.2 A
- B 0.1 A
- C 2.0 A
- D 0.2 A
Answer & Solution
Correct Answer
(D) 0.2 A
Step-by-step Solution
Detailed explanation
\( \frac{R_1}{R_2} = \frac{10}{30} = \frac{1}{3} \) \( \frac{R_3}{R_4} = \frac{30}{90} = \frac{1}{3} \). Bridge is balanced.…
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