An alternating voltage (in volts) given by $$V=200\sqrt{2}sin100t$$ is connected to a$$1~\mu F$$ capacitor through an $$ac$$ ammeter. The reading of the ammeter will be:

 1 $$10~ \mathrm{mA}$$ 2 $$20~ \mathrm{mA}$$ 3 $$40~ \mathrm{mA}$$ 4 $$80~ \mathrm{mA}$$
Subtopic:  Different Types of AC Circuits |
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In the circuit shown below, what will be the readings of the voltmeter and ammeter?

1. 800 V, 2 A

2. 300 V, 2 A

3. 220 V, 2.2 A

4. 100 V, 2 A

Subtopic:  Different Types of AC Circuits |
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An alternating current of frequency ‘f’ is flowing in a circuit containing a resistance R and a choke L in series. The impedance of this circuit will be:

1. R + 2πfL

2. $\sqrt{{R}^{2}+4{\pi }^{2}{f}^{2}{L}^{2}}$

3. $\sqrt{{R}^{2}+{L}^{2}}$

4. $\sqrt{{R}^{2}+2\pi fL}$

Subtopic:  Different Types of AC Circuits |
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In an LCR circuit, the potential difference between the terminals of the inductance is 60 V, between the terminals of the capacitor is 30 V and that between the terminals of the resistance is 40 V. The supply voltage will be equal to:

1. 50 V

2. 70 V

3. 130 V

4. 10 V

Subtopic:  Different Types of AC Circuits |
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In a series RLC circuit, potential differences across R, L and C are 30 V, 60 V and 100 V respectively, as shown in the figure. The emf of the source (in volts) will be:

1. 190

2. 70

3. 50

4. 40

Subtopic:  Different Types of AC Circuits |
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In an LCR series network, ${\mathrm{V}}_{\mathrm{L}}=40$ $\mathrm{V},$ ${\mathrm{V}}_{\mathrm{C}}=20$ $\mathrm{V}$ $\mathrm{and}$ ${\mathrm{V}}_{\mathrm{R}}=15$ $\mathrm{V}$. The supply voltage will be:

1.  25 V

2.  75 V

3.  35 V

4.  Zero

Subtopic:  Different Types of AC Circuits |
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L, C and R represent physical quantities inductance, capacitance and resistance respectively. The combination representing the dimension of frequency will be:

1. LC

2. (LC)–1/2

3. ${\left(\frac{L}{C}\right)}^{-1/2}$

4. $\frac{C}{L}$

Subtopic:  Different Types of AC Circuits |
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A series AC circuit has a resistance of 4 $\mathrm{\Omega }$ and an inductor of reactance 3 $\mathrm{\Omega }$. The impedance of the circuit is z1. Now when a capacitor of reactance 6 $\mathrm{\Omega }$ is connected in series with the above combination, the impedance becomes ${z}_{2.}$ $\frac{{\mathrm{z}}_{1}}{{\mathrm{z}}_{2}}$ will be:

1. 1 : 1

2. 5 : 4

3. 4 : 5

4. 2 : 1

Subtopic:  Different Types of AC Circuits |
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In the circuit shown in the figure, neglecting source resistance, the voltmeter and ammeter reading respectively will be:

1. 0 V, 3 A
2. 150 V, 3 A
3. 150 V, 6 A
4. 0 V, 8 A

Subtopic:  Different Types of AC Circuits |
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In a series LCR circuit, resistance $$R=10~\Omega$$ and the impedance $$Z=20~\Omega$$. The phase difference between the current and the voltage will be:

1. 30°

2. 45°

3. 60°

4. 90°

Subtopic:  Different Types of AC Circuits |
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