Physics-
General
Easy
Question
The vector diagram of current and voltage for a circuit is as shown. The components of the circuit will be
- LCR
- LR
- LCR or LR
- None of these
The correct answer is: LCR or LR
From phasor diagram it is clear that current is lagging with respect to Erms. This may be happen in LCR or LR circuit.
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Two sinusoidal voltages of the same frequency are shown in the diagram. What is the frequency, and the phase relationship between the voltages
Frequency in Hz Phase lead of N over M in radians</span
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Frequency in Hz Phase lead of N over M in radians</span
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When an ac source of e.m.f. 
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When an ac source of e.m.f. is connected across a circuit, the phase difference between the e.m.f. e and the current i in the circuit is observed to be , as shown in the diagram. If the circuit consists possibly only of RC or LC in series, find the relationship between the two elements [IIT-JEE (Screening) 2003]
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The current 'i' in an inductance coil varies with time 't' according to following graph
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The output current versus time curve of a rectifier is shown in the figure. The average value of output current in this case is
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A constant voltage at different frequencies is applied across a capacitance C as shown in the figure. Which of the following graphs
Correctly depicts the variation of current with frequency ?
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Correctly depicts the variation of current with frequency ?
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The r.m.s. voltage of the wave form shown is
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The figure shows variation of R, XL and XC with frequency f in a series L, C, R circuit. Then for what frequency point, the circuit is inductive
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The variation of the instantaneous current (I) and the instantaneous emf (E) in a circuit is as shown in fig. Which of the following statements is correct
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Is it possible
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In the adjoining figure the impedance of the circuit will be
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Physics-General
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In the adjoining ac circuit the voltmeter whose reading will be zero at resonance is
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An ac source of angular frequency 
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An ac source of angular frequency is fed across a resistor r and a capacitor C in series. The current registered is I. If now the frequency of source is changed to /3 (but maintaining the same voltage), the current in then circuit is found to be halved. Calculate the ratio of reactance to resistance at the original frequency
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The reading of ammeter in the circuit shown will be
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In the circuit shown in the figure, the ac source gives a voltage 
Neglecting source resistance, the voltmeter and ammeter reading will be
In the circuit shown in the figure, the ac source gives a voltage Neglecting source resistance, the voltmeter and ammeter reading will be
Physics-General
