MCQ
A 50 volt potential difference is suddenly applied to a coil with $\mathrm{L}=5 \times 10^{-3}$ henry and R = 180 ohm. The rate of increase of current after 0.001 second is
- A27.3 amp/sec
- B27.8 amp/sec
- C2.73 amp/sec
- ✓None of the above
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| List-$I$ | List-$II$ |
| ($P$) ${ }_{92}^{238} U \rightarrow{ }_{91}^{234} \mathrm{~Pa}$ | ($1$) one $\alpha$ particle and one $\beta^{+}$particle |
| ($Q$) ${ }_{82}^{214} \mathrm{~Pb} \rightarrow{ }_{82}^{210} \mathrm{~Pb}$ | ($2$) three $\beta^{-}$particles and one $\alpha$ particle |
| ($R$) ${ }_{81}^{210} \mathrm{Tl} \rightarrow{ }_{82}^{206} \mathrm{~Pb}$ | ($3$) two $\beta^{-}$particles and one $\alpha$ particle |
| ($S$) ${ }_{91}^{228} \mathrm{~Pa} \rightarrow{ }_{88}^{224} \mathrm{Ra}$ | ($4$) one $\alpha$ particle and one $\beta^{-}$particle |
| ($5$) one $\alpha$ particle and two $\beta^{+}$particles |