Electrical Engineering Quiz 42

1 / 50

**In majority of instruments damping is provided by______________? **

2 / 50

**How many coulombs of charge flow through a circuit carrying a current of 10 A in 1 minute? **

3 / 50

**The effect of error damping is to______________? **

4 / 50

**For a D.C. generator when the number of poles and the number of armature conductors is fixed, then which winding will give the higher e.m.f___________ ? **

5 / 50

**Which of the following method of speed control of D.C. machine will offer minimum efficiency ? **

6 / 50

**Whether circuit may be AC or one, following is most effective in reducing the magnitude of the current? **

7 / 50

**The carrier which are commonly used in constant ? frequency PWM is______________? **

8 / 50

**The skin effect of a conductor will reduce as the__________? **

9 / 50

**Which material is used to made a solar cell_______________? **

10 / 50

**The steady state stability of the power system can be increased by_____________? **

11 / 50

**In the operation and control of both naturally commutated and forced commutated SCR base converter, commutation plays an important role. The converters is / are ___________? **

12 / 50

**An air gap is usually inserted in magnetic circuits to____________? **

13 / 50

**A capacitor charged to 200 V has 2000 (iC of charge. The value of capacitance will be_____________? **

14 / 50

**A resistance having rating 10 ohms, 10 W is likely to be a__________? **

15 / 50

**An audio amplifier is an example of _________________? **

16 / 50

**Which of the following is an advantage of eddy current heating ? **

17 / 50

**Which of the following capacitors will have the least variation ____________? **

18 / 50

**When the equivalent circuit diagram of doouble squirrel-cage induction motor is constructed the two cages can be considered__________? **

19 / 50

**The number of independent equations to solve a network is equal to_____________? **

20 / 50

**Which of the following refers to a parallel circuit ? **

21 / 50

**If a particular application needs high speed and high starting torque, then which of the following motor will be preferred ? **

22 / 50

**What is the advantage of HRC fuses over Rewirable fuses? **

23 / 50

**The power factor of a single phase load can be calculated if the instruments available are_____________? **

24 / 50

**The output impedance of a transistor connected in_____________arrangement is the highest? **

25 / 50

**In a p-n junction diode under reverse bias , the magnitude of electric field is maximum at_____________? **

26 / 50

**Fault diverters are basically____________? **

27 / 50

**The purpose of a parallel circuit resonance is to magnify________? **

28 / 50

**Time constant of an inductive circuit_________? **

29 / 50

**In an electric room heat convector the method of heating used is______________? **

30 / 50

**Time constant of a capacitive circuit__________? **

31 / 50

**electromagnets generally function as holding magnets ? **

32 / 50

**Which of the following statements is incorrect ? **

33 / 50

**If the area of hysteresis loop of a material is large, the hysteresis loss in this material will be____________? **

34 / 50

**A 50 kW carrier is to be amplitude modulated to a level of 85%. What is the carrier power after modulation ? **

35 / 50

**A thermistor has_____________? **

36 / 50

**Which of the following can have negative temperature coefficient _____________? **

37 / 50

**The torque produced in induction type relay (shaded pole structure) is_____________? **

38 / 50

**An increase in gain, in most systems, leads to_____________? **

39 / 50

**At series resonance, voltage across L is____________voltage across C? **

40 / 50

**A non inverting closed loop op amp circuit generally has a gain factor______________? **

41 / 50

**If Q of an LC circuit increases, then bandwidth ______________? **

42 / 50

**Bidirectional semiconductor device is___________? **

43 / 50

**If excitation of a synchronous motor running with a constant load is decreased from its normal value, ignoring effects of armature reaction, it leads to____________? **

44 / 50

**Which of the following is incorrect ? **

45 / 50

**The torque developed by a 3-phase induction motor least depends on__________? **

46 / 50

**The maximum output voltage of a certain low-pass filter is 15 V. The output voltage at the critical frequency is_____________? **

47 / 50

**To reduce short circuit fault currents are used_____________? **

48 / 50

**During the commutation period in 3 phase converter, overlap time is_____________? **

49 / 50

**An A.C. voltage is impressed across a pure resistance of 3.5 ohms in parallel with a pure inductance of impedance of 3.5 ohms? **

50 / 50

**The value of a of a transistor is_____________? **

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