CUET · PHYSICS · PYQ PAPER 2025
A railway track running north-south has two parallel rails 1 m apart. Calculate the value of induced emf between the rails, when a train passes at a speed of 25 m/s. The vertical component of earth's magnetic field at that place is \( 0.3 \times 10^{-4} \, Wbm^{-2} \)
- A \( 1.3 \times 10^{-3} \, V \)
- B \( 1.3 \times 10^{3} \, V \)
- C \(7.5 \times 10^{-4} \, V \)
- D \(0.13 V\)
Answer & Solution
Correct Answer
(C) \(7.5 \times 10^{-4} \, V \)
Step-by-step Solution
Detailed explanation
\( \varepsilon = B l v \) \( \varepsilon = (0.3 \times 10^{-4} \, Wbm^{-2}) (1 \, m) (25 \, m/s) \) \( \varepsilon = 7.5 \times 10^{-4} \, V \)
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