Electrical Engineering · Question Bank

Fundamentals of Electricity

141 questions · page 5 of 8. Answer in your head first, then check the solution.

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TypeAll 141Problem solving 47Objective 94
DifficultyAll 141Easy 136Medium 5Hard
#81📘 EE Pocket Reviewer RojasEasy
Trickle charging of a storage battery
AIncreases its capacity
BPrevents sulphation
CKeeps it fresh and fully charged
DMaintains proper electrolyte level
#82📘 EE Pocket Reviewer RojasEasy
The temperature coefficient of resistance of a material is expressed in terms of which of the following units?
AOhms/ohm/°C
BMhos/ohm/°C
CMhos/°C
DOhms/°C
#83📘 EE Pocket Reviewer RojasEasy
The mass of a proton is ____ the mass of an electron.
AEqual to
BLess than
CAbout 1,837 times
DAbout 200 times
#84📘 EE Pocket Reviewer RojasEasy
One “calorie” of heat energy is approximately equivalent to ____ of electrical energy.
A24 watt-sec
B4.2 joules
C860 joules
D3600 watt-hour
#85📘 EE Pocket Reviewer RojasEasy
What type of storage battery generally used in an electric power station?
ALead-acid battery
BCarbon-zinc battery
CNickel-cadmium battery
DLithium-ion battery
#86📘 EE Pocket Reviewer RojasEasy
Which of the following is a sealed secondary ceil?
AEdison cell
BCarbon-zinc cell
CMercury cell
DNickel cadmium cell
#87📘 EE Pocket Reviewer RojasEasy
What is the effect of sulphation in the internal resistance of the battery?
AIt will increase
BIt will decrease
CIt remains the same
DIt will make the resistance vanish
#88📘 EE Pocket Reviewer RojasEasy
The ampere-hour capacity of the battery depends on which of the following?
AThickness of the plates
BCross-section area of the plates
CDistance between the plates
DStrength of the electrolytes
#89📘 EE Pocket Reviewer RojasEasy
Which of the following primary cells has the highest voltage?
ALithium cell
BMercury
CCarbon zinc
DManganese-alkaline
#90📘 EE Pocket Reviewer RojasEasy
The output voltage of a battery charger should be ____ the battery voltage.
AMore than
BEqual to
CLess than
DAny of these
#91📘 EE Pocket Reviewer RojasEasy
Distilled water is invariably used in electrolytes because it
APrevents polarization
BPrevents local action
CAccelerates electrochemical action
DImproves specific gravity of the electrolyte
#92📘 EE Pocket Reviewer RojasEasy
Which one is the most commonly used cell?
ALead-acid cell
BNickel-cadmium cell
CNickel-iron cell
DFuel cell
#93📘 EE Pocket Reviewer RojasEasy
What is the advantage of methanol over hydrogen for use in fuel cells?
AMethanol is easier to transport and store
BMethanol is solid at room temperature
CMethanol is the most abundant element in the universe
DMethanol is not flammable
#94📘 EE Pocket Reviewer RojasEasy
Five carbon-zinc cells in series have an output of
A7.5V
B11V
C15V
D50V
#95📘 EE Pocket Reviewer RojasEasy
What is the electrolyte used in a lead-acid ceil?
ANaOH
BOnly \(H_2SO_4\)
CKOH
DDilute \(H_2SO_4\)
#96📘 EE Pocket Reviewer RojasEasy
What will happen to the internal resistance of a fully discharged battery?
AIt will increase
BIt will decrease but will not dropped to zero
CIt remains the same as before
DIt will vanish completely
#97📘 EE Pocket Reviewer RojasEasy
The emf of a cell does not depend upon which of the following?
ASize and spacing of electrodes
BNature of electrolyte
CConcentration of electrolyte
DNature of material of electrolyte
#98📘 EE Pocket Reviewer RojasEasy
What is the purpose of connecting the cells in series?
ATo decrease the voltage output
BTo increase output voltage
CTo decrease the internal resistance
DTo increase the internal resistance
#99📘 EE Pocket Reviewer RojasEasy
Which one is a disadvantage of mercury cells?
AThey don't last as long as the other types
BThey have a flat discharge curve
CMercury is destructive to the environment
DThey need to be recharge often
#100📘 EE Pocket Reviewer RojasEasy
The condition of a secondary cell can be determined using which of the following?
AValue of its terminal voltage
BStrength of its electrolyte
CLevel of its electrolyte
DBoth A and B

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