Test Instructions:
- This Mock test contains 30 MCQ questions.
- Choice and sequence for attempting questions will be as per the convenience of the candidate.

- Read each question carefully.
- Determine the one correct answer out of the four available options given for each question.

- Each question awards you 1 point.
- You can end the test any time by clicking “quiz summary>finish quiz”.


- The mock test will automatically be submitted when the time is up.

- You can review all questions once again and evaluate your mistakes by clicking “view questions” when the result is displayed.

- You can apply for Leaderboard when the result is displayed.

- You can re-attempt the exam as per your wish, yet scores of the first attempt will be recorded!
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Question 1 of 30
1. Question
1 point(s)The instantaneous current in a circuit is i = sin (ωt +ø ) ampere. What is the R.M.S value of current is
CorrectIncorrect -
Question 2 of 30
2. Question
1 point(s)A 40Ω electric heater is connected to a 200V, 50 Hz mains supply. The peak value of electric current flowing in the circuit is approximately.
CorrectIncorrect -
Question 3 of 30
3. Question
1 point(s)E.M.F is given by e= 200sin 50t . The r.m.s value of current in a circuit of resistance 50Ω is
CorrectIncorrect -
Question 4 of 30
4. Question
1 point(s)An alternating current of rms value 10A is passed through a 12Ω resistor. The maximum potential difference across the resistor is
CorrectIncorrect -
Question 5 of 30
5. Question
1 point(s)A 10μF capacitor is connected across a 200 V, 50 Hz AC supply. The peak current through the circuit is:
CorrectIncorrect -
Question 6 of 30
6. Question
1 point(s)The inductive reactance of a coil is 1000Omega. If its inductance and the frequency of A.C. supply are both doubled, then the reactance will become
CorrectIncorrect -
Question 7 of 30
7. Question
1 point(s)An inductive coil has a resistance of 100 Ω When an AC signal of frequency 1000 Hz is applied to the coil, the voltage leads the current by 45∘ . The inductance of the coil is
CorrectIncorrect -
Question 8 of 30
8. Question
1 point(s)When 100 V DC is applied across a solenoid, a current of 1.0 A flows in it. When 100 V AC is applied across the same coil. The current drops to 0.5A. If the frequency of the ac source is 50 Hz, the impedance and inductance of the solenoid are
CorrectIncorrect -
Question 9 of 30
9. Question
1 point(s)220 V, 50 Hz AC source is connected to an inductance of 0.2 H and a resistance of 20 ohm in series. What is the current in the circuit:
CorrectIncorrect -
Question 10 of 30
10. Question
1 point(s)In a series LCR circuit R=300Ω, L=0.9H, C=2μF, ω=1000rad/sω=1000rad/. The impedance of the circuit is
CorrectIncorrect -
Question 11 of 30
11. Question
1 point(s)The inductance of a coil is 10 H. What is the ratio of its reactance when it is connected first to an A.C. source and then to a D.C. source?
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Question 12 of 30
12. Question
1 point(s)In an oscillating L-C circuit the maximum charge on the capacitor is Q. The charge on the capacitor when the energy is stored equally between the electric and magnetic field is :
CorrectIncorrect -
Question 13 of 30
13. Question
1 point(s)A resistor R, an inductor L and capacitor C are connected in series to an oscillator of frequency n. If the resonant frequency is nr, then the current lags behind voltage, when
CorrectIncorrect -
Question 14 of 30
14. Question
1 point(s)A coil of 4mH and a capacitor of 10 muF are in series with an A.C. source along with 5Omega resistances. If inductive reactance, then the angular frequency (in rad/s) of source is
CorrectIncorrect -
Question 15 of 30
15. Question
1 point(s)The frequency at which the inductive reactance of 2H inductance will be equal to the capacitive reactance of 2μF capacitance (nearly)
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Question 16 of 30
16. Question
1 point(s)In series L-C-R circuit, the capacitance is changed from C to 2C. The inductance should be changed from L to … to obtain same resonance frequency.
CorrectIncorrect -
Question 17 of 30
17. Question
1 point(s)If the potential difference across the inductor (3mH) is same as that across the condenser (30muF) in a series R-L-C circuit, then the frequency of the applied e.m.f. is
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Question 18 of 30
18. Question
1 point(s)The rms value of current in a 50Hz AC circuit is 6A. The average value of AC current over a cycle is
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Question 19 of 30
19. Question
1 point(s)A coil is self-inductance L is connected in series with a bulb B and an AC source. Brightness of the bulb decreases when :
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Question 20 of 30
20. Question
1 point(s)A small signal voltage V(t)=V0sinωt is applied across an ideal capacitor C :
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Question 21 of 30
21. Question
1 point(s)In a series LCR circuit, the potential drop across L,C and R respectively are 40V, 120Vand 60V. Then the source voltage is
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Question 22 of 30
22. Question
1 point(s)The L-C parallel resonant circuit
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Question 23 of 30
23. Question
1 point(s)A capacitor of capacitance 10μF is connected to an AC source and an AC Ammeter. If the source voltage varies as V=50√2sin100t, the reading of the ammeter is
CorrectIncorrect -
Question 24 of 30
24. Question
1 point(s)An alternating voltage v(t)=220 sin100nt volt is applied to a purely resistance load of 50Ω. The time taken for the current to rise from half of the peak value to the peak value is
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Question 25 of 30
25. Question
1 point(s)Alternating current of peak value (2π) ampere flows through the primary coil of the transformer. The coefficient of mutual inductance between primary and secondary coil is 1 henry. The peak e.m.f. induced in secondary coil is
(Frequency of AC=50Hz)CorrectIncorrect -
Question 26 of 30
26. Question
1 point(s)A wheel of moment of inertia 2kgm² is rotating about an axis passing through centre and perpendicular to its plane at a speed s60rad/s. Due to friction, it comes to rest in 5 minutes. The angular momentum of the wheel three minutes before it stops rotating is
CorrectIncorrect -
Question 27 of 30
27. Question
1 point(s)When ‘W’ joule of work done on a flywheel . its frequency of rotation increases from n1 Hz to n2 Hz . The M.I of flywheel about its axis of rotation is given by
CorrectIncorrect -
Question 28 of 30
28. Question
1 point(s)A solid cylinder of mass 2kg and radius 4cm is rotating about its axis at the rate of 3 rpm . The torque required to stop after 2π revolutions is
CorrectIncorrect -
Question 29 of 30
29. Question
1 point(s)A particle is moving in a circular path of radius a under the action of an attractive potential U = -k/2r² . Its total energy is
CorrectIncorrect -
Question 30 of 30
30. Question
1 point(s)For increasing the angular velocity of a object by 10%, the kinetic energy has to be increased by
CorrectIncorrect