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Q. No.The variation of EMF with time for four types of generators is shown in the figures. Which amongst them can be called AC voltage?
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| (a) | (b) |
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| (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 |
80%
From NCERT
NEET - 2019
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In a heating arrangement, an alternating current having a peak value of 28 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 A | 2. | about 28 A |
| 3. | about 20 A | 4. | cannot say |
Subtopic: AC vs DC |
57%
From NCERT
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A light bulb is rated at 100 W for a 220 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 |
81%
From NCERT
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In an AC circuit, an alternating voltage ε=200√2sin(100t) V is connected to a capacitor of capacity 1 μF. The RMS value of the current in the circuit is:
| 1. | 100 mA | 2. | 200 mA |
| 3. | 20 mA | 4. | 10 mA |
Subtopic: RMS & Average Values | Different Types of AC Circuits |
77%
From NCERT
AIPMT - 2011
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The peak voltage of the AC source is equal to:
| 1. | 1/√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. | √2 times the rms value of the AC source. |
Subtopic: RMS & Average Values |
79%
From NCERT
NEET - 2022
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A standard filament lamp consumes 100 W when connected to 200 V AC mains supply. The peak current through the bulb will be:
1. 0.707 A
2. 1 A
3. 1.414 A
4. 2 A
1. 0.707 A
2. 1 A
3. 1.414 A
4. 2 A
Subtopic: RMS & Average Values |
73%
From NCERT
NEET - 2022
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An AC source is rated 220 V, 50 Hz. The average voltage is calculated in a time interval of 0.01 s. It,
| 1. | must be zero |
| 2. | may be zero |
| 3. | is never zero |
| 4. | is 220√2 V |
Subtopic: RMS & Average Values |
52%
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A 15.0 μF capacitor is connected to a 220 V, 50 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 |
81%
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A resistor of 200 Ω and a capacitor of 15.0 μF are connected in series to a 220 V, 50 Hz AC source. The voltage (RMS) across the resistor and the capacitor are respectively:
1. 160.3 V,160.3 V
2. 151 V,151 V
3. 160.3 V,151 V
4. 151 V,160.3 V
Subtopic: Different Types of AC Circuits |
From NCERT
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An AC source is connected to the given circuit. The value of ϕ will be:
| 1. | 60∘ | 2. | 90∘ |
| 3. | 30∘ | 4. | 45∘ |
Subtopic: Different Types of AC Circuits |
67%
From NCERT
NEET - 2023
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