Electrical Engineering · Question Bank

Fundamentals of Electricity

136 of 141 questions match · page 1 of 7. Answer in your head first, then check the solution.

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#1📜 EE Pre-Board August 2012📘 PowerhouseEasy
An electric motor converted 700 W of electrical input into work at 58.186 kg-m/s. The speed was 1750 rpm. Find the kg-m of driven torque.
A0.183
B0.381
C0.138
D0.318
#2📜 EE Pre-Board March 2013📘 PowerhouseEasy
Farad is equivalent to what unit?
AVolt-coulomb
BCoulomb/volt
CJoule/volt
DJoule/coulomb
#3📜 EE Pre-Board March 2013📘 PowerhouseEasy
Heating effect of current has undesirable side effect in
AElectric oven
BImmersion heater
CElectric iron
DVacuum cleaner
#4📜 EE Pre-Board March 2013📘 PowerhouseEasy
An electric current can neither be ______nor______.
AFelt, seen
BSeen, touched
CSeen, touch any effect
DProduced, felt
#5📜 EE Pre-Board March 2013📘 PowerhouseEasy
An automatic device that operates at preset values is known as
AMercury switch
Bfuse
Crelay
Dcontactor
#6📜 EE Pre-Board August 2013📘 PowerhouseEasy
A conductor radius of 0.1625 inch. What is the area in circular mils?
A26,406.25
B82,957.68
C100,000
D105,625
#7📜 EE Pre-Board August 2013📘 PowerhouseEasy
Temperature coefficient of a conductor is defined as the
Aincrease in resistance per ohm per degree centigrade
Bincrease in resistance per degree centigrade
Cincrease in resistance per degree absolute
Ddecrease in resistance per ohm per degree centigrade
#8📜 EE Pre-Board August 2013📘 PowerhouseEasy
A heater wire of length 50 cm and 1 mm² in cross-section carries a current of 2 A when connected across a 2 V battery. What is the resistivity of the wire?
A\(2 \times 10^{-6}\) Ω-m
B\(2 \times 10^{-5}\) Ω-m
C\(4 \times 10^{-6}\) Ω-m
D\(4 \times 10^{-5}\) Ω-m
#9📜 EE Pre-Board August 2013📘 PowerhouseEasy
A rectangular bus bar is made of aluminum and is 90 cm long, 10 cm wide and 1 cm thick. If the bus bar current flows along its length, find the bus bar conductance provided the conductivity is \(3.6 \times 10^{8}\) S/m.
A\(0.4 \times 10^{6}\) S
B\(0.4 \times 10^{5}\) S
C\(0.5 \times 10^{6}\) S
D\(0.5 \times 10^{5}\) S
#10📜 EE Pre-Board August 2013📘 PowerhouseEasy
An energy source supplies 500 J of energy at 100 v for a certain period of time. Determine the quantity of charge passed through.
A0.2 c
B50 kc
C20 c
D5 c
#11📜 EE Pre-Board August 2013📘 PowerhouseEasy
A 500 MCM ACSR cable has 37 strands. Determine the diameter in mils of each strand.
A116.25
B118.34
C110.35
D120.24
#12📜 EE Pre-Board March 2014📘 PowerhouseEasy
There are two wired A and B. If the resistance of B is R and the diameter of A is twice of B, the length and the nature of the material is the same, find resistance of A.
AR/2
BR/4
C4R
D2R
#13📜 EE Pre-Board March 2014📘 PowerhouseEasy
The breakdown voltage of the dielectric of a cable is 800 volts/mil. A factor of safety of 4 is used. Find the maximum voltage at 3.5 mils.
A2,800 v
B700 v
C3,600 v
D900v
#14📜 EE Pre-Board March 2014📘 PowerhouseEasy
A wire has a resistance of 1 Ω. If the length is increased four times and the area is doubled, find the new resistance of the wire.
A5 Ω
B2 Ω
C1 Ω
D0.5
#15📜 EE Pre-Board March 2014📘 PowerhouseEasy
A 40-m metallic conductor of cross-sectional area 1 mm² has a resistance of 12 Ω. Calculate the conductivity of the metal.
A3.33 MS/m
B0.333 MS/m
C6.67 MS/m
D0.667 MS/m
#16📜 EE Pre-Board March 2014📘 PowerhouseEasy
A span of wire 1 km long has a conductance of 0.6 s. What is the conductance of a span of this same wire that is 3 km long?
A1.8 s
B0.6 s
C0.2 s
D0.36 s
#17📜 EE Pre-Board March 2014📘 PowerhouseEasy
An electrical insulator can be made a conductor
Aby heating it
Bby cooling it
Cby ionizing it
Dby oxidizing it
#18📜 EE Pre-Board August 2014📘 PowerhouseEasy
One MWHR is equivalent to___________.
A8,160 calories
B1,000 KWHR
C4,186 joules
D3,412 BTU
#19📜 EE Pre-Board August 2014📘 PowerhouseEasy
The heat required to raise 1 gram of water at 1 degree Celsius.
ACalorie
BBTU
Cjoule
DKWHR
#20📜 EE Pre-Board March 2015📘 PowerhouseEasy
A material best suited for manufacturing of fuse wire is
AAluminum
BSilver
CLead
DCopper

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