In a box Z of unknown elements (L or R or any other combination), an ac voltage E=E0sin(ωt+ϕ) is applied and the current in the circuit is found to be I=I0sin(ωt+ϕ+π4). The unknown elements in the box could be:

1. Only the capacitor
2. Inductor and resistor both
3. Either capacitor, resistor, and an inductor or only capacitor and resistor
4. Only the resistor

Subtopic:  Different Types of AC Circuits |
 64%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

In the transformer shown in the figure, the ratio of the number of turns of primary to the secondary is N1N2=150. If a battery of emf 10 V is connected across primary, then induced current through the load of 10 kΩ in the secondary is

1. 120A 
2. Zero 
3. 110A 
4. 15A

Subtopic:  Transformer |
From NCERT
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

What is the average power dissipated in the ac circuit if current i = 100sin100t A and V=100sin(100t+π/3) volts?

1. 2500 W

2. 250 W

3. 5000 W

4. 4000 W

Subtopic:  Power factor |
 76%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

EMF induced in the secondary coil of an ideal transformer does not depend upon

1. EMF in the primary coil

2. Frequency of source

3. Ratio of number of turns

4. Both (1) & (3)

Subtopic:  Transformer |
 77%
From NCERT
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

The phase difference between emf and current through the choke coil maybe

1. 0°

2. 85°

3. 45°

4. 30°

Subtopic:  Different Types of AC Circuits |
From NCERT
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 bulb is rated at 100 V, 100 W, and is treated as a resistor. The inductance of an inductor (choke coil) that should be connected in series with the bulb to operate the bulb at its rated power with the help of an ac source of 200 V and 50 Hz is:
1. \(\frac{\pi }{\sqrt{3}}~H\)
2. \(100~H\)
3. \(\frac{\sqrt{2}}{\pi }~H\)
4. \(\frac{\sqrt{3}}{\pi }~H\)

Subtopic:  Different Types of AC Circuits |
 56%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The value of current in two series LCR circuit at resonance is the same when connected across a sinusoidal voltage source. Then

1. Both circuit should have the same value of capacitance and inductor

2. In both circuits, the ratio of L and C will be the same

3. For both the circuits, resistance must be the same

4. Both circuit should have the same impedance at all frequencies

 

Subtopic:  Different Types of AC Circuits |
 51%
From NCERT
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

An ideal transformer is made to step down the power line voltage of 2200 V for distribution to a city at 220 v. If the full load impedance of the city is 4 Ω then the primary current is

1. 45 A

2. 5.5 A

3. 55 A

4. 0.55 A

Subtopic:  Transformer |
 73%
From NCERT
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

What is the phase difference between potential difference across the inductor and potential difference across the capacitor in a series LCR circuit?

1. Zero

2. π4
3. π4
4. π

Subtopic:  Different Types of AC Circuits |
 72%
From NCERT
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

For a series, LCR circuit quality factor is α and potential difference across circuit β. The potential difference across the inductor in resonance state will be:

1. Zero

2. αβ

3. βα

4. αβ

Subtopic:  Different Types of AC Circuits |
 54%
From NCERT
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