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Electric Circuits

Electric Circuits
In series RLC circuit, voltage across resistor, inductor and capacitor are 5V, 2V and 2V respectively. Find total voltage?

 4V
 2V
 9V
 5V

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Electric Circuits
The capacitance of a conductor is varying from 2 microfarad to zero in 1 sec linearly if the voltage applied to it is 6 V the energy stored in 0.5 sec in the condenser is

 18 µ joules.
 20 µ joules.
 10 µ joules.
  55.1 µ joules.

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Electric Circuits
A delta connection contains three equal impedance of 60 Ω. The impedance of the equivalent star connection for each star load will be

 20 Ω.
 15 Ω.
 40 Ω.
 30 Ω.

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Electric Circuits
Condition of symmetry in Z-parameter representation is

 Z12 = Z21.
 Z11 = Z22.
 Z12 = Z22.
 Z11 = Z12.

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Electric Circuits
R1 = 36 Ω and R2 = 75 Ω, each having tolerance of ±5% are connected in series. The value of resultant resistance is

 111 ± 7.23 Ω.
  111 ± 0 Ω.
 111 ± 2.77 Ω.
  111 ± 5.55 Ω.

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Electric Circuits
A 20 μF capacitor and 200 W, 220 V lamp is connected in series across a 220 V alternating supply. In which frequency of the supply the lamp will glow dimmest?

 100 Hz.
 10 Hz.
 1000 Hz.
 1 Hz.

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