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Alternating Current question

2020 · 4 Sep · Shift 2 · Q56
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Alternating Current question

2020 · 4 Sep · Shift 2 · Q56

JEE MainPhysicsAlternating CurrentMCQ+4 / −1
A series L-R circuit is connected to a battery of emf V. If the circuit is switched on at t = 0, then the time at which the energy stored in the inductor reaches (1n)\left( {{1 \over n}} \right)(n1​) times of its maximum value, is :
  1. A
    LRln⁡(nn+1){L \over R}\ln \left( {{{\sqrt n } \over {\sqrt n + 1}}} \right)RL​ln(n​+1n​​)
  2. B
    LRln⁡(nn−1){L \over R}\ln \left( {{{\sqrt n } \over {\sqrt n - 1}}} \right)RL​ln(n​−1n​​)
  3. C
    LRln⁡(n+1n−1){L \over R}\ln \left( {{{\sqrt n + 1} \over {\sqrt n - 1}}} \right)RL​ln(n​−1n​+1​)
  4. D
    LRln⁡(n−1n){L \over R}\ln \left( {{{\sqrt n - 1} \over {\sqrt n }}} \right)RL​ln(n​n​−1​)
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