An ac source is connected to a capacitor $$C$$. Due to decrease in its operating frequency:
 1 capacitive reactance remains constant 2 capacitive reactance decreases. 3 displacement current increases. 4 displacement current decreases.
Subtopic:  Different Types of AC Circuits |
From NCERT
NEET - 2023
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$$12~\text{V},60~\text{W}$$ lamp is connected to the secondary of a step down transformer, whose primary is connected to ac mains of $$220~\text{V}$$. Assuming the transformer to be ideal, what is the current in the primary winding?
1. $$0.37 ~\mathrm{A}$$
2. $$0.27 ~\mathrm{A}$$
3. $$2.7 ~\mathrm{A}$$
4. $$3.7 ~\mathrm{A}$$
Subtopic:  Transformer |
65%
From NCERT
NEET - 2023
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In a series $$\mathrm{LCR}$$ circuit, the inductance $$\mathrm{L}$$ is $$10$$ mH, capacitance $$\mathrm{C}$$ is $$1~\mathrm{\mu F}$$ and resistance $$\mathrm{R}$$ is $$100~\Omega$$. The frequency at which resonance occurs is:
1. $$1.59$$ kHz
2. $$15.9$$ rad/s
3. $$15.9$$ kHz
4. $$1.59$$ rad/s
Subtopic:  Different Types of AC Circuits |
57%
From NCERT
NEET - 2023
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The net impedance of circuit (as shown in the figure) will be:

1. $$25~\Omega$$
2. $$10\sqrt{2}~\Omega$$
3. $$15~\Omega$$
4. $$5\sqrt{5}~\Omega$$

Subtopic:  Different Types of AC Circuits |
56%
From NCERT
NEET - 2023
Hints

An ac source is connected to the given circuit. The value of $$\phi$$ will be:

1. $$60^\circ$$
2. $$90^\circ$$
3. $$30^\circ$$
4. $$45^\circ$$
Subtopic:  Different Types of AC Circuits |
60%
From NCERT
NEET - 2023
Hints

If $$Z_1$$ and $$Z_2$$ are the impedances of the given circuits (a) and (b) as shown in figures, then choose the correct option:

 1 $$Z_1Z_2$$

Subtopic:  Different Types of AC Circuits |
55%
From NCERT
NEET - 2023
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The maximum power is dissipated for an ac in a/an:
 1 resistive circuit 2 $$\mathrm{LC}$$ circuit 3 inductive circuit 4 capacitive circuit
Subtopic:  Different Types of AC Circuits |
67%
From NCERT
NEET - 2023
Hints

For very high frequencies, the effective impedance of the circuit (shown in the figure) will be:

1. $$4~ \Omega$$
2. $$6~ \Omega$$
3. $$1~ \Omega$$
4. $$3~ \Omega$$
Subtopic:  Different Types of AC Circuits |
From NCERT
NEET - 2023
Hints

The peak voltage of the ac source is equal to:

 1 $$1 / \sqrt{2}$$ times the rms value of the ac source. 2 the value of voltage supplied to the circuit. 3 the rms value of the ac source. 4 $$\sqrt{2}$$ times the rms value of the ac source.
Subtopic:  RMS & Average Values |
72%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A series LCR circuit with inductance $$10~\mathrm{H}$$, capacitance $$10~\mu F$$, resistance $$50~\Omega$$ is connected to an ac source of voltage, $$V=200 \sin (100 t) \text { volt }$$. If the resonant frequency of the LCR circuit is $$\nu_0$$ and the frequency of the ac source is $$\nu$$, then:

 1 $$\nu=100 \mathrm{~Hz} ; ~\nu_0=\frac{100}{\pi} \mathrm{~Hz}$$ 2 $$\nu_0=\nu=50 \mathrm{~Hz}$$ 3 $$\nu_0=\nu=\frac{50}{\pi} \mathrm{Hz}$$ 4 $$\nu_{0}=\frac{50}{\pi}~ \mathrm{Hz}, \nu=50 \mathrm{~Hz}$$
Subtopic:  Different Types of AC Circuits |
68%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh