WorksheetsBasics of Electrical Engg 1
Total questions: 25
Worksheet time: 19mins
Name
Class
Date
1.
The term Current in electric circuit is analogus to ______of magnetic circuit.
a)
Reluctance
b)
MMF
c)
Flux
d)
Permeability
2.
The SI unit of Permeability is______
a)
H/m
b)
F/m
c)
Wb/m
d)
NOTA
3.
What will be the new resistance of a conductor having R resistance, if its length is doubled & diameter is halved?
a)
R/2
b)
2R
c)
4R
d)
8R
4.
The formula for Apperent Power in 3-phase circuit is________
a)
3.VL.IL
b)
√3.VL.IL.cosø
c)
√3.VL.IL
d)
VL.IL
5.
The permissible voltage variation in 1-phase, 230V, 50Hz A.C. supply is______
a)
1 percent
b)
5 percent
c)
10 percent
d)
15 percent
6.
_______is the p.f. of a purely capacitive circuit.
a)
1
b)
0 lagging
c)
0 leading
d)
0.5
7.
What will be the power consumption in purely inductive circuit having 0.1H inductance is supplied through 1-phase 230V, 50Hz a.c. supply?
a)
23W
b)
52900W
c)
230W
d)
0 W
8.
Unit of reactive power is_______
a)
Watt
b)
V.A
c)
VAR
d)
NOTA
9.
__________converts electrical energy into mechanical energy.
a)
Motor
b)
Generator
c)
Transformer
d)
Voltage stabilizer
10.
Transformer works on_________ principle.
a)
Self Electromagnetic Induction
b)
Mutual Electromagnetic Induction
c)
Conduction
d)
Radiation
11.
Generally efficiency of the transformer is____%
a)
Less than 30
b)
in between 30 to 50
c)
in between 50 to 90
d)
More than 90
12.
The material used for the filament of incandescent lamp is made up of_________.
a)
Neon
b)
Tungsten
c)
Aluminium
d)
Tin
13.
What will be the value of equivalent resistances in delta connection if three resistances of 30Ω are connected in star connection?
a)
90Ω
b)
30Ω
c)
10Ω
d)
60Ω
14.
If R12=10Ω, R23=10Ω & R31=50Ω are connected in delta then R2=____Ω in its equivalent star connection.
a)
70Ω
b)
1.44Ω
c)
7Ω
d)
7.14Ω
15.
Internal resistance of an ideal current source is ____Ω.
a)
Zero
b)
Infinite
c)
Both 1&2
d)
Neither 1 nor 2
16.
Which of the following element of circuit ideally does not consume electrical power?
a)
Resistor
b)
Inductor
c)
Capacitor
d)
Both 2&3
17.
Equivalent capacitance in the diagram?
a)
19uF
b)
27uF
c)
3uF
d)
NOTA
18.
Equivalent resistance in given diagram?
a)
15Ω
b)
11Ω
c)
3Ω
d)
NOTA
19.
What is the value of current I in given circuit?
a)
1A
b)
2A
c)
3A
d)
NOTA
20.
Find V?
a)
3V
b)
4V
c)
12V
d)
16V
21.
If January 1, 2011 was Sunday, then what day of week lies on January 1, 2012 ?
a)
Saturday
b)
Sunday
c)
Monday
d)
Tuesday
22.
At 03:40Hrs, the hour hand & the minute hand of a clock form an angle of ___degrees.
a)
120
b)
130
c)
140
d)
150
23.
An athlete runs 200m race in 24 seconds. His speed is:
a)
8.33km/hr
b)
20km/hr
c)
25km/hr
d)
30km/hr
24.
Nilesh gains 80 paise on Rs 80. His gain in percent is:
a)
0.1 percent
b)
1 percent
c)
8 percent
d)
10 percent
25.
At present, the ratio between the ages of A & B is 4:3. After 6 years, A's age will be 26 years. What is the age of B at present?
a)
12 years
b)
15years
c)
18years
d)
21years
100 %
