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Electric Circuits

Electric Circuits
Internal resistance of ideal voltage source is

 100 ohms
 zero
 infinite
 finite

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Electric Circuits
Which of the followings is/are active element?

 Current source
 None of these.
 Both
 Voltage source

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Electric Circuits
In parallel RC circuit total current is 5A and current through resistor is 3A. What is the current through capacitor?

 4A
 5A
 3A
 2A

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Electric Circuits
A capacitor having a capacitance of 40 μF is connected across 250 V DC source. The charging current will be least

 initially.
 when capacitor is almost 25% charged.
 when capacitor is fully charged.
 when capacitor is half charged.

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Electric Circuits
The value of unity impulse function at time (t) = 0 is

 indeterminate.
 infinite.
 1.
 0.

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Electric Circuits
An AC voltage of 200 V at 50 Hz is applied to a coil which draws 5 A and dissipates 1000 W. The resistance and impedance of the coil respectively are

 25 Ω and 5 Ω.
 40 Ω and 40 Ω.
 40 Ω and 200 Ω.
 50 Ω and 200 Ω.

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