Govt Exams Mock Test FREE | Online Quiz Competition

Q1. A coil has inductance 8H. Find the induced EMF in it, if the rate of change of current in the coil is 8 A/s ?

16 V

8 V

24 V

32 V

Q2. If a charged linear time-in varient capacitor is connected across an uncharged capacitor, then the waveform of the charging current will be

Ramp

Impulse

Exponential

Step

Q3. What is the flux density in a magnetic field of cross-sectional area 20 \(cm^2\) having a flux of 3 mWb?

3 T

6.5 T

4.25 T

1.5 T

Q4. The peak value of a sine wave is 200 V. Its average value is

141.4 V

282.8 V

200 V

127.4 V

Q5. If \(f_1\) and \(f_2\) are half-power frequencies, such that \(f_2> f_1\), then the bandwidth B =__________.

\(f_2- f_1\)

\(\frac{f_1}{f_2}\)

\(f_2 + f_1\)

\(\frac{f_2}{f_1}\)

Q6. Which of the following factor have value of 1.1 for sinusoidal alternating current only?

Crest factor

Form factor

Peak factor

Amplitude factor

Q7. Two-wattmeter method is used to measure the power taken by a 3-phase induction motor on no load. The wattmeter readings are 375 W and –50 W. Calculate the reactive power taken by the load.

\(\frac{425}{\sqrt3}\) VAR

\(325\sqrt3\) VAR

\(425\sqrt3\) VAR

\(\frac{325}{\sqrt3}\) VAR

Q8. What will be the Magnetomotive force in a coil having 250 turns and carrying a current of 10A ?

25000 AT

25 AT

250 AT

2500 AT

Q9. State true or false for the following statements.
1. A toroidal magnet has no air gap.
2. The unit of mmf is Wb/Ampere.

False, True

False, False

True, True

True, False

Q10. If the distance between two point charges of Electricity is doubled, the electrostatic force between them will be

same as original force

1/2 of the original force

1/4 of the original force

double the original force

Quiz

Year 2024

November
Week # 1 Quiz 2

Q1. A coil has inductance 8H. Find the induced EMF in it, if the rate of change of current in the coil is 8 A/s ?

Q2. If a charged linear time-in varient capacitor is connected across an uncharged capacitor, then the waveform of the charging current will be

Q3. What is the flux density in a magnetic field of cross-sectional area 20 \(cm^2\) having a flux of 3 mWb?

Q4. The peak value of a sine wave is 200 V. Its average value is

Q5. If \(f_1\) and \(f_2\) are half-power frequencies, such that \(f_2> f_1\), then the bandwidth B =__________.

Q6. Which of the following factor have value of 1.1 for sinusoidal alternating current only?

Q7. Two-wattmeter method is used to measure the power taken by a 3-phase induction motor on no load. The wattmeter readings are 375 W and –50 W. Calculate the reactive power taken by the load.

Q8. What will be the Magnetomotive force in a coil having 250 turns and carrying a current of 10A ?

Q9. State true or false for the following statements.
1. A toroidal magnet has no air gap.
2. The unit of mmf is Wb/Ampere.

Q10. If the distance between two point charges of Electricity is doubled, the electrostatic force between them will be

Quiz

Year 2024

September Week # 2 Expire on 07 Oct 2024

September Week # 3 Expire on 14 Oct 2024

September Week # 4 Expire on 21 Oct 2024

October Week # 1 Expire on 31 Oct 2024

November Week # 1 Quiz 2

Q1. A coil has inductance 8H. Find the induced EMF in it, if the rate of change of current in the coil is 8 A/s ?

Q2. If a charged linear time-in varient capacitor is connected across an uncharged capacitor, then the waveform of the charging current will be

Q3. What is the flux density in a magnetic field of cross-sectional area 20 \(cm^2\) having a flux of 3 mWb?

Q4. The peak value of a sine wave is 200 V. Its average value is

Q5. If \(f_1\) and \(f_2\) are half-power frequencies, such that \(f_2> f_1\), then the bandwidth B =__________.

Q6. Which of the following factor have value of 1.1 for sinusoidal alternating current only?

Q7. Two-wattmeter method is used to measure the power taken by a 3-phase induction motor on no load. The wattmeter readings are 375 W and –50 W. Calculate the reactive power taken by the load.

Q8. What will be the Magnetomotive force in a coil having 250 turns and carrying a current of 10A ?

Q9. State true or false for the following statements. 1. A toroidal magnet has no air gap. 2. The unit of mmf is Wb/Ampere.

Q10. If the distance between two point charges of Electricity is doubled, the electrostatic force between them will be

Record & Track Your Performance

November
Week # 1 Quiz 2

Q9. State true or false for the following statements.
1. A toroidal magnet has no air gap.
2. The unit of mmf is Wb/Ampere.