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Alternating Current question

2014 · Shift 1 · Q48
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Alternating Current question

2014 · Shift 1 · Q48

JEE AdvancedPhysicsAlternating CurrentMultiple correct+3 / −1
At time t = 0, terminal A in the circuit shown in the figure is connected to B by a key and an alternating current I(t) = I0 cos (ω\omegaω t), with I0 = 1 A and ω\omegaω= 500 rad s-1 starts flowing in it with the initial direction shown in the figure. At t=7π6ωt = {{7\pi } \over {6\omega }}t=6ω7π​, the key is switched from B to D. Now onwards only A and D are connected. A total charge Q flows from the battery to charge the capacitor fully. If C = 20 μ\muμ F, R = 10 Ω\OmegaΩ and the battery is ideal with emf of 50 V, identify the correct statement(s). JEE Advanced 2014 Paper 1 Offline Physics - Alternating Current Question 11 English
  1. A
    Magnitude of the maximum charge on the capacitor before t=7π6ωt = {{7\pi } \over {6\omega }}t=6ω7π​ is 1 ×\times× 10 −-− 3 C
  2. B
    The current in the left part of the circuit just before t=7π6ωt = {{7\pi } \over {6\omega }}t=6ω7π​ is clockwise
  3. C
    Immediately after A is connected to D, the current in R is 10 A
  4. D
    Q = 2 ×\times× 10 −-− 3 C
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