# Basic Electrical and Electronics Engineering (BEE)

## ME3I

### 22310

#### Multiple Choice Questions (MCQs)

1   Permeability in a magnetic circuit corresponds to ——– in an electric circuit
(A)   Resistance
(B)   Resistivity
(C)   Conductivity
(D)   Conductance

2   The property of a material which opposes the creation of magnetic flux in it is known as
(A)   Reluctivity
(B)   Magnetomotive force
(C)   Permeance
(D)   Reluctance

3   What is the magnetic field outside a solenoid?
(A)   Infinity
(B)   Half the value of the field inside
(C)   Double the value of the field inside
(D)   Zero

4   If the flow of electric current is parallel to the magnetic field, the force will be ——
(A)   Zero
(B)   Infinity
(C)   Maximum
(D)   Half the original value

5   What is the strength of magnetic field known as?
(A)   Flux
(B)   Density
(C)   Magnetic strength
(D)   Magnetic flux density

6   Can we see magnetic flux lines?
(A)   Yes
(B)   No
(C)   Depends on the strength of the field
(D)   Only when the field strength is very large

7   In case of Inductive circuit, inductance (L) is ———–Proportional to the inductive reactance (XL).
(A)   Directly
(B)   Inversely
(C)   No Effect
(D)   None of the above

8   In an RLC series phasor, we start drawing the phasor from which quantity?
(A)   Voltage
(B)   Resistance
(C)   Impedance
(D)   Current

9   Which type of ac waveform is given in figure?

(A)   sinusoidal
(B)   triangular
(C)   square
(D)   complex waveform

10   The variation of a quantity such as voltage or current shown on a graph is known as ———–
(A)   Waveform
(B)   Peak value
(C)   Instantaneous value
(D)   Period

11   What is the duration of one cycle known as?
(A)   Waveform
(B)   Peak value
(C)   Instantaneous value
(D)   Period

12   The maximum instantaneous value measured from zero value is known as?
(A)   Peak value
(B)   Peak to peak value
(C)   Cycle
(D)   Period

13   If the peak-to-peak voltage is 10V, calculate the peak voltage.
(A)   10V
(B)   2V
(C)   4V
(D)   5V

14   RMS stands for ——–
(A)   Root Mean Square
(B)   Root Mean Sum
(C)   Root Maximum sum
(D)   Root Minimum Sum

15   The units for inductance are ——— and capacitance is ———–
(D)   Henry, Coulomb

16   What happens to the MMF when the magnetic flux decreases?
(A)   Increases
(B)   Decreases
(C)   Remains constant
(D)   Becomes zero

17   The induced emf in a material opposes the flux producing it. This is
(B)   Ampere law
(C)   Lenz law
(D)   Curie law

18   The energy in a magnetic material is due to which process?
(A)   Emf
(B)   Magnetization
(C)   Magnetostriction
(D)   Polarization

19   The resistance in a magnetic material is called as
(A)   Capacitance
(B)   Inductance
(C)   Reluctance
(D)   Magnetic resistance

20   The frequency of an alternating current is
(A)   The speed with which the alternator runs
(B)   The number of cycles generated in one minute
(C)   The number of waves passing through a point in one second
(D)   The number of electrons passing through a point in one second

21   The unit of frequency is
(A)   Cycle
(B)   Cycle-second
(C)   Hertz/second
(D)   Hertz

22   Materials which easily allow the passage of electric current are known as ——
(A)   Insulators
(B)   Conductors
(C)   Dielectrics
(D)   Semi-conductors

23   When a coil is rotated in a magnetic field, the emf induced in it?
(A)   Is maximum
(B)   Is minimum
(C)   Continuously varies
(D)   Remains constant

24   In an A.C. generator, increase in number of turns in the coil ———
(A)   Increases emf
(B)   Decreases emf
(C)   Makes the emf zero
(D)   Maintains the emf at a constant value

25   When PN junction diode is in reversed biased
(A)   Holes and electrons tend to concentrate towards the junction
(B)   The barrier tends to break down
(C)   Holes and electrons tend to move away from the junction
(D)   None of the above

26   The diode is used in
(A)   Clamper circuits
(B)   Clipper
(C)   Rectifiers
(D)   All of the above

27   The advantage of LED is
(A)   Long life
(B)   Fast on-off switching
(C)   Low operating voltage
(D)   All of the above

28   In an RLC circuit, which of the following is always used as a vector reference?
(A)   Voltage
(B)   Resistance
(C)   Impedance
(D)   Current

29   Transformer ratings are usually expressed in terms of
(A)   Voltage
(B)   KVA
(C)   KWh
(D)   KW

30   Total windings present in a autotransformer are __________
(A)   1
(B)   2
(C)   3
(D)   4

31   An autotransformer compared to its two-winding counterpart has a higher operating efficiency.
(A)   TRUE
(B)   FALSE

32   What type of coils are used for winding the single phase induction motor generally?
(A)   rectangular coils
(B)   square coils
(C)   cruciform coils
(D)   circular coils

33   How many steps are involved in the construction of single phase induction motor?
(A)   3
(B)   4
(C)   5
(D)   6

34   How many methods are present in the self starting of the single phase induction motor?
(A)   1
(B)   2
(C)   3
(D)   4

35   The capacitor doesn’t allow sudden changes in ———–
(A)   Voltage
(B)   Current
(C)   Resistance
(D)   Capacitance

36   An Inductor works as a ___________ circuit for DC supply.
(A)   Open
(B)   Short
(C)   Polar
(D)   Non-polar

37   The insulating medium between the two plates of capacitor is known as __________
(A)   Electrode
(B)   Capacitive medium
(C)   Conducting medium
(D)   Dielectric

38   Transformer works with __________
(A)   Ac voltages only
(B)   Dc voltages only
(C)   Ac & DC voltages
(D)   None of the Mentioned

39   Transformers windings are generally made of __________
(A)   Steel iron alloy
(B)   Copper
(C)   Iron
(D)   Steel