AP EAMCET · PHYSICS · Electromagnetic Induction
A metallic wire loop of side \((l) 0.1 \mathrm{~m}\) and resistance of \(1 \Omega\) is moved with a constant velocity in a uniform magnetic field of \(2 \mathrm{Wm}^{-2}\) as shown in the figure. The magnetic field is perpendicular to the plane of the loop. The loop is connected to a network of resistors. The velocity of loop so as to have a steady current of 1 mA in loop is
- A \(0.67 \mathrm{~cm} \mathrm{~s}^{-1}\)
- B \(2 \mathrm{~cm} \mathrm{~s}^{-1}\)
- C \(3 \mathrm{~cm} \mathrm{~s}^{-1}\)
- D \(4 \mathrm{~cm} \mathrm{~s}^{-1}\)
Answer & Solution
Correct Answer
(B) \(2 \mathrm{~cm} \mathrm{~s}^{-1}\)
Step-by-step Solution
Detailed explanation
\(1=0.1 \mathrm{~m}, \mathrm{R}=1 \Omega, \mathrm{~B}=2 \mathrm{Wm}^{-2}, \mathrm{I}=1 \mathrm{~mA}=10^{-3} \mathrm{~A}\) Motional emf, \(\mathrm{E}=\mathrm{Bvl}\)…
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