CUET · PHYSICS · PYQ PAPER 2023
A metal conductor of length 1m rotates in vertical plane about an axis passing through one of its ends at angular velocity 4 rad s-¹. What is the emf developed between the two ends of the conductor, if the horizontal component of the earth's magnetic field is 0.2 G?
- A 4mV
- B 40mV
- C 4μν
- D 40μν
Answer & Solution
Correct Answer
(D) 40μν
Step-by-step Solution
Detailed explanation
\( B = 0.2 \, \text{G} = 0.2 \times 10^{-4} \, \text{T} = 2 \times 10^{-5} \, \text{T} \) \( \varepsilon = \frac{1}{2} B \omega L^2 \) \( \varepsilon = \frac{1}{2} (2 \times 10^{-5} \, \text{T}) (4 \, \text{rad s}^{-1}) (1 \, \text{m})^2 \)…
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