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Q1:

The variation of EMF with time for four types of generators is shown in the figures. Which amongst them can be called AC voltage?


(a)	(b)

(c)	(d)

Choose the correct option from the given ones:

1.	(a) and (d)
2.	(a), (b), (c), and (d)
3.	(a) and (b)
4.	only (a)

Subtopic: AC vs DC |

79%

From NCERT

NEET - 2019

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Q2:

In a heating arrangement, an alternating current having a peak value of

28 A

$28~\text{A}$ is used. To produce the same heat energy, if direct current is used to produce the same amount of heat, then its magnitude will be:

1.	about $14~\text{A}$	2.	about $28~\text{A}$
3.	about $20~\text{A}$	4.	cannot say

Subtopic: AC vs DC |

57%

From NCERT

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Q3:

A light bulb is rated at $100~\text{W}$ for a $220~\text{V}$ AC supply. The RMS current through the bulb is:
1. $0.243$ A
2. $0.454$ A
3. $0.222$ A
4. $0.312$ A

Subtopic: RMS & Average Values |

80%

From NCERT

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Q4:

In an AC circuit, an alternating voltage

ε = 200 \sqrt{2} \sin (100 t) V

$\varepsilon=200 \sqrt{2} \sin (100 t)~\text{V}$ is connected to a capacitor of capacity

1 μ F .

$1~\mu \text{F}.$ The RMS value of the current in the circuit is:

1.	$100~\text{mA}$	2.	$200~\text{mA}$
3.	$20~\text{mA}$	4.	$10~\text{mA}$

Subtopic: RMS & Average Values | Different Types of AC Circuits |

77%

From NCERT

AIPMT - 2011

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4

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Q5:

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 |

77%

From NCERT

NEET - 2022

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Q6:

A standard filament lamp consumes

100 W

$100~\text W$ when connected to

200 V

$200~\text V$ AC mains supply. The peak current through the bulb will be:
1.

0.707 A

$0.707~\text A$
2.

1 A

$1~\text A$
3.

1.414 A

$1.414~\text A$
4.

2 A

$2~\text A$

Subtopic: RMS & Average Values |

72%

From NCERT

NEET - 2022

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Q7:

An AC source is rated $220~\mathrm{V}$ , $50~\mathrm{Hz}$ . The average voltage is calculated in a time interval of $0.01~\mathrm{s}$ . It,

1.	must be zero
2.	may be zero
3.	is never zero
4.	is $220\sqrt{2}$ V

Subtopic: RMS & Average Values |

51%

From NCERT

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Q8:

A $15.0~\mathrm{\mu F}$ capacitor is connected to a $220~\mathrm{V},$ $50~\mathrm{Hz}$ source. If the frequency is doubled, what happens to the capacitive reactance and the current?

1.	The capacitive reactance is halved and the current is doubled.
2.	The capacitive reactance is doubled and the current is halved.
3.	The capacitive reactance remains the same and the current is doubled.
4.	The current remains the same and the capacitive reactance is halved.

Subtopic: Different Types of AC Circuits |

79%

From NCERT

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Q9:

A resistor of $200~\mathrm{\Omega}$ and a capacitor of $15.0~\mu\text{F}$ are connected in series to a $220~\text{V}$ , $50$ Hz AC source. The voltage (RMS) across the resistor and the capacitor are respectively:
1. $160.3 ~\text{V}, 160.3 ~\text{V}$
2. $151 ~\text{V}, 151 ~\text{V}$
3. $160.3 ~\text{V}, 151 ~\text{V}$
4. $151 ~\text{V}, 160.3 ~\text{V}$

Subtopic: Different Types of AC Circuits |

From NCERT

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Q10:

An AC source is connected to the given circuit. The value of

ϕ

$\phi$ will be:

1.	$60^\circ$	2.	$90^\circ$
3.	$30^\circ$	4.	$45^\circ$

Subtopic: Different Types of AC Circuits |

65%

From NCERT

NEET - 2023

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