# BASIC ELECTRICAL PART 10 ONLINE MCQ EE

## BASIC ELECTRICAL PART 10 Category –EE Online Test

Attempt Free BASIC ELECTRICAL PART 10 Here. Read The Important Electrical MCQ From Below.

 In ac circuit, the ratio of kW/kVA is
A. Power factor
B. Form factor
D. Diversity factor

 Suppose that two ac waves have the same frequency but differ in phase by exactly 1/20 of a cycle. What is the phase difference between these two waves?

A.  18°
B.  20°
C.  36°
D.  5.73°

BASIC ELECTRICAL PART 10

 The unit of inductance is

A. Mho
B. Hendry
C. Ohm

 What is the angular frequency of the ac signal having a frequency of 1770Hz

D.  Data insufficient

BASIC ELECTRICAL PART 10

 Thevenin’s equivalent circuit consists of

A. Series combination of Rth, Eth, Rl
B. Series combination of Rth, Eth
C. Parallel combination of Rth, Eth, Rl
D. Parallel combination of Rth, Eth

 The frequency of DC supply is
A. 16 2/3 Hz
B. 60 Hz
C. 50 Hz
D. 0 Hz

 Load factor is defined as the ratio of
A. Max demand/ Average demand
C. Average demand/ Max. demand

BASIC ELECTRICAL PART 10

 Q factor of an inductive coil is given by

A.  2π fL/R
B.  2π fr/R
C.  R/Z
D. lr/l

 The rms value of sinusoidal 100V peak to peak is
A. 100 V
B. 50/√2 V
C. 50 V
D. 100/√2 V

BASIC ELECTRICAL PART 10

 Which of the following bulbs will have the least resistance?
A. 220V, 60W
B. 220V, 100W
C. 115V, 60W
D. 115V, 100W

Solution Hint:
 One cycle = 360°.
1/20 of cycle is 360/20 = 18°

 Angular frequency ω = 2πf (rad/s)

BASIC ELECTRICAL PART 10

 Some of the important terms in power system:
Demand factor = maximum demand / Connected load Diversity factor = Sum of individual max. demands / Max. demand on power station The ratio of average load to the maximum demand during a given period is known as load factor. Load Factor = Average Load / maximum demand

 Quality factor is the ratio of reactive power to average power (Q/P)
Qs = [I2XL]/[I2R]
Qs = XL/R
Qs = ωL/R
Qs =2π fL/R

 Vrms = Vm/√2

BASIC ELECTRICAL PART 10