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Alternating Cur...

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  • Question 1
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    An inductor 2020 mH, a capacitor 100100 μ\muF and a resistor 5050 Ω\Omega are connected in series across a source of emf, V=10=10 sin314\sin 314t. The power loss in the circuit is?

  • Question 2
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    A coil has resistance 30 ohm30   ohm and inductive reactance 20 ohm20   ohm at 50 Hz50   Hz frequency. If an acac source of 200 volt, 100 Hz200   volt,  100   Hz, is connected across the coil, the current in the coil will be

  • Question 3
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    A coil of self-inductance L is connected in series with a bulb B and an AC source. Brightness of the bulb decreases when

  • Question 4
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    A series R-C circuit is connected to an alternating voltage source. Consider two situation:
    (a) When capacitor is filled
    (b) When capacitor is mica filled
    Current through resister is i and voltage across capacitor is V then :

  • Question 5
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    A 40μF40 \mu F capacitor is connected to a 200V, 50Hz ac200 V,\ 50 Hz \ ac supply. The rms value of the current
    in the circuit is, nearly :

  • Question 6
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    A condenser of 250μF250\mu F is connected in parallel to a cell of inductance 0.160.16 mH, while its effective resistance is while its. Determine the resonant frequency.

  • Question 7
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    In a series LCR circuit, the voltage across the resistance, capacitance and inductance is 10 V10\ V each. If the capacitance is short circuited the voltage across the inductance will be :

  • Question 8
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    Reciprocal of Impedance is:

  • Question 9
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    A 10 μF10\ \mu F capacitor is connected across a $$200\  V$$, 50 Hz 50 \ Hz A.C. supply. The peak current through the circuit is :

  • Question 10
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    The instantaneous value of emf and current in an A.C. circuit are E=1.414E=1.414sin( 100πtπ4100\pi t-\frac{\pi }{4} ) , I=0.707 I=0.707 sin(100πt100\pi t) . The resistance of the circuit is

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