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Electric Circuits

Electric Circuits
In which braking back emf exceeds supply voltage?

  Plugging.
  Dynamic.
  Regenerative.
  None of these.

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Electric Circuits
In above question, determine the current if E = 100 V, R = 20Ω, R1 = 10 Ω and L = 2 H at 0.5 sec after short circuit.

 - 6.28.
 9.59.
 6.98.
 - 9.59.

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Electric Circuits
If c1 = 8 μF, c2 = 4 μF, c3 = 7 μF c1, c2 are in series with c3 in parallel; effective capacitance will be

 6 μF.
 9.67 μF.
 2.21 μF.
 3 μF.

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Electric Circuits
A branch of a network is said to be active when it consists of one

 capacitor.
 resistor.
 voltage source.
 inductor.

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Electric Circuits
A 35 V source is connected to a series circuit of 600 Ω and R as shown. If a voltmeter of internal resistance 1.2 kΩ is connected across 600 Ω resistor, it reads 5 V. The value of R is

 3.6 k Ω.
 2.4 k Ω.
 7.2 k Ω.
 1.2 k Ω.

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Electric Circuits
In RLC series circuit, if the voltage across capacitor is greater than voltage across inductor, then power factor of the network is

 unity.
 zero.
 leading.
 lagging.

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