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Electric Circuits

Electric Circuits
In RL series circuit R=2Ω and L=2mH. What is the value of time constant?

 1msec
 2msec
 4msec
 100sec

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Electric Circuits
If Vout = 1 V for 1 kHz input then what would be Vout for 10 kHz for same input ?

 0.1 V .
  1 V.
 None of these.
 0.01 V.

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Electric Circuits
The capacitive reactance of an electric circuit is 50 Ohms. The frequency of supply becomes doubled. What is the new capacitive reactance?

 50 Ohms.
 100 Ohms.
 200 Ohms.
 25 Ohms.

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Electric Circuits
Laplace transform analysis gives

 frequency domain response only.
 real response only.
 both (a) and (b).
 time domain response only.

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Electric Circuits
If the dielectric of a capacitor is replaced by conducting material

 the capacitor will get heated up due to eddy currents.
 the capacitance value of the plate will decrease.
 the plate will get short circuited.
 the capacitor can store infinite charge.

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Electric Circuits
A coil of negligible resistance has an induction of 100 mH. The current passing through the coil changes from 2 A to 4 A at a uniform rate in 0.1 sec the voltage across the coil during this time would be __________ V.

 2
 8
 36
 50

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