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A series ac circuit consist of an inductor and a capacitor. The inductance and capacitance is respectively 1 henry and 25 μF. If the current is maximum in circuit then angular frequency will be

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Important Questions on Alternating Current

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Alpha Question Bank for Medical: Physics>Chapter 28 - Alternating Current>Exercise-1>Q 83
The value of power factor cosϕ in the series LCR circuit at resonance is,
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Alpha Question Bank for Medical: Physics>Chapter 28 - Alternating Current>Exercise-1>Q 84
A series LCR circuit containing a resistance of 120 Ω has angular resonance frequency 4 × 103 rad s–1. At resonance, the voltage across resistance and inductance are 60 V and 40 V, respectively. The values of L and C are, respectively,
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Alpha Question Bank for Medical: Physics>Chapter 28 - Alternating Current>Exercise-1>Q 85
In an LCR circuit, the capacitance is made one-fourth, when in resonance. Then what should be the change in inductance, so that the circuit remains in resonance?
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Alpha Question Bank for Medical: Physics>Chapter 28 - Alternating Current>Exercise-1>Q 86
A resistor R, an inductor L and a capacitor C are connected in series to an oscillator of frequency n. If the resonant frequency is nr, then the current lags behind voltage, when
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Alpha Question Bank for Medical: Physics>Chapter 28 - Alternating Current>Exercise-1>Q 87
A 10 Ω resistance, 5 mH coil and 10 μF capacitor are joined in series. When a suitable frequency alternating current source is joined to this combination, the circuit resonates. If the resistance is halved, the resonance frequency
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Alpha Question Bank for Medical: Physics>Chapter 28 - Alternating Current>Exercise-1>Q 88
At a frequency more than the resonance frequency, the nature of an anti-resonant circuit is-
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Alpha Question Bank for Medical: Physics>Chapter 28 - Alternating Current>Exercise-1>Q 89
If resonance frequency is f and then the capacity is increased 4 times, then new resonance frequency becomes-
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Alpha Question Bank for Medical: Physics>Chapter 28 - Alternating Current>Exercise-1>Q 90
In a transformer, number of tums in the primary are 140 and that in the secondary are 280. If current in primary is 4 A, then that in the secondary is : (assume that the transformer is ideal)