A coil having n turns and resistance R Ω is connected with a galvanometer of resistance…
Physics · JEE Main · NTA Exams — Electromagnetic Induction and Alternating Currents
A coil having n turns and resistance R Ω is connected with a galvanometer of resistance 4R Ω. This combination is moved in time t seconds from a magnetic flux W1 weber to W2 weber. The induced current in the circuit is
- \(\frac{\mathrm{W}_{2}-\mathrm{W}_{1}}{5 \mathrm{Rnt}}\)
- \(-\frac{\mathrm{n}\left(\mathrm{~W}_{2}-\mathrm{W}_{1}\right)}{5 \mathrm{R}}\)
- \(-\frac{\left(\mathrm{W}_{2}-\mathrm{W}_{1}\right)}{\mathrm{Rnt}}\)
- \(-\frac{\mathrm{n}\left(\mathrm{~W}_{2}-\mathrm{W}_{1}\right)}{\mathrm{R}}\)
Answer
(B) - n ( ~W _ 2 - W _ 1 ) 5 R
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