Electrical Engineering · Question Bank

Fundamentals of Electricity

141 questions · page 4 of 8. Answer in your head first, then check the solution.

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TypeAll 141Problem solving 47Objective 94
DifficultyAll 141Easy 136Medium 5Hard
#61📜 EE Pre-Board August 2017📘 PowerhouseEasy
A copper conductor with a diameter of 0.10 inch has a resistance of 1 ohm per 1,000 ft. What is the resistance of 200 ft of copper wire with a diameter of 40 mils?
A0.2 Ω
B0.5 Ω
C1.25 Ω
D6.25 Ω
#62📜 EE Pre-Board August 2017📘 PowerhouseMedium
A transmission line cable consists of 26 strands of identical copper conductor, each 1.255 mm in diameter. The length of the cable is 10 km, but because of the twist of the strands, the actual length of each conductor is increased by 5%. If the resistivity of copper is \(1.72 \times 10^{-8}\) Ω·m, what is the resistance of the cable in ohms?
A5.35
B146
C0.562
D5.62
#63📜 EE Pre-Board March 2018📘 PowerhouseEasy
The diameter of a conductor is 0.064 inch. What is the area in circular mils?
A5,000
B10,000
C3,217
D4,096
#64📜 EE Pre-Board March 2018📘 PowerhouseEasy
The basis where the flow of current is from positive to negative was derived from __________
ASuperstition
BTradition
CScientific
DConvention
#65📜 EE Pre-Board March 2018📘 PowerhouseEasy
One kilowatt is equal to ____ metric horsepower.
A1.26
B1.36
C1.46
D1.56
#66📜 EE Pre-Board March 2018📘 PowerhouseEasy
The output of a motor in watts when it takes a power of 3 kW and its efficiency is 75% is
A2000
B2250
C2500
D2750
#67📜 EE Pre-Board March 2018📘 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\(2 \times 10^{-8}\) Ω·m
C\(4 \times 10^{-6}\) Ω·m
D\(4 \times 10^{-8}\) Ω·m
#68📜 EE Pre-Board March 2018📘 PowerhouseEasy
The condition in Ohm’s law is that
Athe ratio V/I should be constant
Bcurrent should be proportional to voltage
Cthe temperature should remain constant
Dthe temperature should vary
#69📜 EE Pre-Board March 2018📘 PowerhouseEasy
How is the storage battery rated in capacity?
Avolts
Bwatts
Camperes
Dampere-hour
#70📜 EE Pre-Board August 2018📘 PowerhouseEasy
Find the frequency of a radio wave whose wavelength is 600m.
A500Hz
B500kHz
C150Hz
D150kHz
#71📜 EE Pre-Board August 2018📘 PowerhouseEasy
The condition in Ohm’s Law is that
Aratio V/I should be constant
Bcurrent should be proportional to voltage
Cthe temperature should remain constant
Dthe temperature should vary
#72📜 EE Pre-Board August 2018📘 PowerhouseEasy
An aluminum cable has 10 identical strands, a length of 1,500m and a diameter of 2.50 mm each. What is the resistance of the cable?
A86.3 Ω
B0.863 Ω
C56.3 Ω
D0.563 Ω
#73📜 EE Pre-Board August 2018📘 PowerhouseEasy
Wavelength is the distance travelled by an electromagnetic wave during the time of one cycle. Given a wavelength of 12 meters, what is the frequency?
A250 kHz
B25 kHz
C250 MHz
D25 MHz
#74📜 EE Pre-Board August 2018📘 PowerhouseEasy
The condition of a liquid electrolyte is measured in terms of its
Acurrent value
Bspecific gravity
Cacid content
Dvoltage output
#75📜 EE Pre-Board August 2018📘 PowerhouseEasy
If a certain conductor has an area of 336,400 circular mils, what is the radius of this conductor in cm?
A0.0663
B0.81
C0.737
D0.921
#76📘 EE Pocket Reviewer RojasEasy
What is the temperature coefficient of resistance of a conductor?
APositive
BNegative
CZero
DEither A or
#77📘 EE Pocket Reviewer RojasEasy
Which of the following is false?
AA lead-acid cell can be recharged
BA primary cell has an irreversible chemical action
CA storage cell has a reversible chemical action
DA carbon-zinc cell has unlimited shelf life
#78📘 EE Pocket Reviewer RojasEasy
A good conductor has a high ____
AResistance
BImpedance
CConductance
DReluctance
#79📘 EE Pocket Reviewer RojasEasy
The mass of an atom is determined by the number of which of the following?
ANeutrons
BElectrons
CNeutrons and protons
DElectrons and neutrons
#80📘 EE Pocket Reviewer RojasEasy
Which of the following is a unit of conductivity?
AMho/meter
BMho-meter
COhm-meter
DOhm/meter

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