Q.

What is the resistance to be connected in series with a condenser of a capacity 5μF  so that the phase difference between the current and the applied voltage is 450 when the angular frequency of the applied voltage is 400 rads–1

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a

250Ω

b

400Ω

c

500Ω

d

600Ω

answer is C.

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Detailed Solution

It phase difference between voltage and current is 450 then Xc = R.1ωC=R15×10-6×400=R=1032=500Ω
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What is the resistance to be connected in series with a condenser of a capacity 5μF  so that the phase difference between the current and the applied voltage is 450 when the angular frequency of the applied voltage is 400 rads–1