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)In a half wave rectifier the AC input source of frequency 50Hz is used. The fundamental frequency of the output is
CorrectIncorrect -
Question 2 of 30
2. Question
1 point(s)An n-p-n transistor conducts when
CorrectIncorrect -
Question 3 of 30
3. Question
1 point(s)In a common emitter amplifier circuit using an n-p-n transistor , the phase difference between the input and the output voltages will be
CorrectIncorrect -
Question 4 of 30
4. Question
1 point(s)For a transistor , α(DC) and β(DC) are the current ratios , then the value of β(DC) -α(DC)/β(DC). α(DC) is
CorrectIncorrect -
Question 5 of 30
5. Question
1 point(s)If α-current gain of a transistor is 0.98. What is the value of β-current gain of the transistor ?
CorrectIncorrect -
Question 6 of 30
6. Question
1 point(s)For a transistor, the current ratio α(dc) = 69/70. The current gain β(dc) isCorrectIncorrect -
Question 7 of 30
7. Question
1 point(s)For CE transistor amplifier, the audio signal voltage across the collector resistance of 2kΩ is 4V. If the current amplification factor of the transistor is 100 and the base resistance is 1kΩ, then the input signal voltage is
CorrectIncorrect -
Question 8 of 30
8. Question
1 point(s)A transistor is used as a common emitter amplifier with a load resistance 2 KΩ. the input resistance is 150 Ω. Base current is changed by 20 μA which results in a change in collector current by 1.5mA. The voltage gain of the amplifier is
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Question 9 of 30
9. Question
1 point(s)Which logic gates produces ‘LOW’ output when any of the inputs is ‘HIGH’ ?
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Question 10 of 30
10. Question
1 point(s)CorrectIncorrect -
Question 11 of 30
11. Question
1 point(s)CorrectIncorrect -
Question 12 of 30
12. Question
1 point(s)CorrectIncorrect -
Question 13 of 30
13. Question
1 point(s)CorrectIncorrect -
Question 14 of 30
14. Question
1 point(s)How many NAND gates are needed to form an AND gate ?
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Question 15 of 30
15. Question
1 point(s)For a transistor ,[ 1/α – 1/β] is equal to
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Question 16 of 30
16. Question
1 point(s)In a common base amplifier circuit , calculate the change in base current if that in the emitter current is 2mA and α= 0.98
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Question 17 of 30
17. Question
1 point(s)A combination of AND function and NOT function results in
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Question 18 of 30
18. Question
1 point(s)The Boolean expression for OR function is
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Question 19 of 30
19. Question
1 point(s)In transistor as an amplifier if α = I(C)/I(E) and β = I(C)/I(B) then ,
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Question 20 of 30
20. Question
1 point(s)In a transistor α is always
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Question 21 of 30
21. Question
1 point(s)A solar cell works on the principle of
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Question 22 of 30
22. Question
1 point(s)A uniform cylinder has length ‘L’ and radius ‘R’ . The moment of inertia of the cylinder about an axis passing through its centre and perpendicular to its length is equal to moment of inertia of the same cylinder about an axis passing through its centre and perpendicular to its circular face. The relation between ‘L’ and ‘R’ is
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Question 23 of 30
23. Question
1 point(s)The radius of gyration of a uniform rod of length l about an axis passing through a point l/4 away from the centre of the rod and perpendicular to to it is
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Question 24 of 30
24. Question
1 point(s)A rope is wound around a hollow cylinder of mass 3kg and radius 40cm . What is angular acceleration of cylinder if the rope is pulled with force of 30N?
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Question 25 of 30
25. Question
1 point(s)A disc has mass ‘M’ and radius ‘R’ . How much tangential force should be applied to the rim of the disc so as to rotate with angular velocity ω in time t ?
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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
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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
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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
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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
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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