Voltage and current in an A.C. circuit is given by V=20sin(314t) V and l=10sin314t+π3 A.

Wattful current in the circuit is-

1. 10 A 
2. 5 A 
3. 52A 
4. 102A 

Subtopic:  Different Types of AC Circuits |
 51%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

Which of the following devices is not based on Faraday's law of electromagnetic induction?

1. AC generator

2. Speedometer

3. Induction motor

4. DC motor

Subtopic:  DC Generator & Motor (OLD NCERT) |
 62%
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

Current l through an inductor is increasing according to i=2t. Variation of the rate of increment of its energy dudt with time t is correctly shown in the graph
  
1.                2. 
3.               4. 

Subtopic:  LC Oscillations (OLD NCERT) |
 55%
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 time-varying current is given by l=5sinωt+π6 Its r.m.s. value is (symbols have usual meanings)

1. 55 A
2. 10 A 
3. 52 A 
4. 152A 

Subtopic:  RMS & Average Values |
 93%
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 alternating voltage V2sinωt at different frequencies is applied across a capacitor C as shown in the figure. Which of the following graphs between RMS current (I)(I) observed by an ammeter and angular frequency ω of voltage is correct?
          
1.              2. 
3.              4. 

Subtopic:  Different Types of AC Circuits |
 68%
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

It is found that the current through the LCR series circuit is at its maximum. If Vr,Vc and VL are potential differences across resistance, capacitor, and inductor respectively, then which of the following is correct?

1. \(V_r=V_L>V_C\)   
2. \(V_R \neq V_L=V_C\)
3. \(V_R \neq V_L \neq V_C\)
4. \(V_R=V_C \neq V_L\)
Subtopic:  Different Types of AC Circuits |
 83%
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 a series L-C-R circuit, different physical quantities vary with frequency ω. Which of the following curves represent the correct frequency variation of the corresponding quantity?

1. Curve (l) for R

2. Curve (ll) for XC

3. Curve (lll) for XL

4. All of these

Subtopic:  Different Types of AC Circuits |
 89%
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 the circuit shown in figure below, the ammeter A2 reads 1.6 A and ammeter A3 read 0.4 A If ω0 is angular frequency and f is frequency of ac, then

1. ω0=4LC
2. f=2πLC
3. The ammeter A1 reads 1.2 A 
4. The ammeter A1 reads 2 A

Subtopic:  LC Oscillations (OLD NCERT) |
 61%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

If the reading of V1 and V3 are 100 V each, the reading of V2 is

1. 0 V

2. 100 V

3. 200 V

4. Cannot be determined by given information

Subtopic:  Different Types of AC Circuits |
 82%
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

If current \(i_1=3A sin \omega t\) and current \(i_2=4A cos \omega t,\) then \(i_3\) is:

     

1. \(5 A \sin \left(\omega t+53^{\circ}\right) \)
2. \(5 A \sin \left(\omega t+37^{\circ}\right) \)
3. \(5 A \sin \left(\omega t+45^{\circ}\right) \)
4. \( 5 A \sin \left(\omega t+30^{\circ}\right)\)

Subtopic:  AC vs DC |
 58%
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