WorksheetsELECS 2
Total questions: 50
Worksheet time: 50mins
What is the number of outputs of a full adder circuit?
2
3
4
1
What is the color code for a 220Ω 5% resistor?
Red, Red, Brown, Gold
Orange, Orange, Black, Gold
Red, Red, Black, Gold
Red, Red, Brown, Silver
If 60 J of energy are available for every 15 C of charge, what is the voltage?
4V
60V
15V
0.25V
An atom's atomic number is determined by the number of:
neutrons minus protons
protons
electrons
neutrons
What is the color code for a 2205% resistor?
Open
Insulated
Hig resistance
Closed
Which resistive component is designed to be temperature sensitive?
Thermistor
Rheostat
Potentiometer
Photoconductive Cell
The battery symbol is:
What type of switch is this?
Push botton
SPST
DPDT
SPDT
Primary batteries, unlike secondary batteries, may be:
Charged once
Used ones
Recharged over and over
Stored indefinitely
In practical applications, battery voltage:
is restored as soon as disconnect occurs
is lowered as the load increases
may be stored indefinitely
will be reduced to zero as power is drawn
The negative and positive charge symbols are assigned (in that order) to the:
proton and electron
electron and proton
atom and nucleus
electron and element
A voltmeter is used:
to measure current
in series with the circuit
in parallel with the circuit
to measure coulombs
If the current in a circuit equals 0 A, it is likely that the:
voltage is too high
resistance is too low
circuit has a short
circuit is open
Current equals:
coulumbs / time
coulumbs x time
voltage / time
voltage x time
What is the unit and symbol for current?
Ampere, A
Coulomb, I
Ampere, Q
Ampere, I
Which part of an atom has no electrical charge?
Electron
Neutron
Proton
All of the above
Which voltage source converts chemical energy to electrical energy?
Electrical generator
Battery
Solar cell
Electronic power supply
An example of potential energy is:
tea-kettle steam
a moving vehicle
the sun
a battery
If 40 C of charge flow past a point in 20 s, what is the current?
2 A
0.5 A
20 A
40 A
Batteries differ from fuel cells in that
a battery is a closed system
a battery uses hydrogen and oxygen to create electricity
a battery uses a polymer electrolyte membrane
none of the above
The removal of a non-neutral subatomic particle converts the atom into a:
charged ion
nucleus
heavier element
compound
One coulomb passing a point in one second is one:
ampere
volt
ohm
charge
In which states may matter may be found?
solid, liquid, or mineral
solid, gas, or liquid
mineral, gas, or liquid
plastic, solid, or gas
Material that consists of a mixture of elements is considered to be:
an element
an ion
a compound
a molecule
How many valence shell electrons are there in semiconductor atoms?
16
8
4
2
When considering conventional current versus electron current flow:
electron current flow came first
protons move in conventional current flow
conventional current flow came first
the direction of current is the same in both methods
Which unit of charge contains 6.25 × 1018 electrons?
An ampere
A coulomb
A volt
A joule
A switch is a device that:
short circuits complex circuits
holds a fuse
has double poles
opens or completes a current path
The term used to designate electrical pressure is:
voltage
current
resistance
conductance
Which electronics material opposes the movement of free electrons?
Conductor
Insulator
Semiconductor
Element
Current is considered as the movement of:
electrons
protons
charge
nuclei
A lead-acid battery is an example of a
solar cell
fuel cell
primary battery
secondary battery
The charge of one coulomb is equal to:
6.24 x 10−18 electrons
one ampere
one second
6.24 x 1018 electrons
A basic electric circuit is made up of what components?
A load, a resistor, and a conductive path for current
A voltage source, a load, and a conductive path for current
A voltage source, a conductive path for current, and a battery
A conductive path for current, a battery, and a copper wire
An ammeter is used to measure
voltage
current
resistance
All of the above
What is the name of the pressure that moves electrons in a closed circuit?
amperes
ohms
voltage
coulombs
What is a characteristic of a secondary cell?
rechargeability
not rechargeable
a dry cell
non-liquid
What are the basic building blocks that all matter is composed of?
electrons, neutrons, and protons
two protons for each neutron
two protons for each electron
electrons, neutrons, and charged ions
If a fluid system is compared to an electrical system, the fluid pump will correspond to a:
conductor
lamp
battery
insulator
An element is a substance that is:
varied throughout the entire piece
used only in electronics
electrically charged
found only in its pure form
Current is:
the presence of a positive charge
the abundance of electrons
the movement of electrons
the repulsion of electrons
What do you call a diagram that shows the electrical connections of a circuit's components?
A schematic diagram
A pictorial diagram
A block diagram
An electrical diagram
A short circuit will have:
a small current flow
a large current flow
no current flow
some current flow
The basic difference between a fuse and a circuit breaker is
a fuse is slower
a fuse is reusable
a circuit breaker is reusable
a circuit breaker is more reliable
Which is the smallest?
atom
proton
neutron
electron
A secondary cell generates dc via chemical activity; a primary cell generates dc:
electrically
thermally
optically
chemically
Which of the following statements is true?
Unlike charges repel and like charges attract.
Like charges repel and unlike charges attract.
Unlike charges attract and like charges attract.
Like charges repel and unlike charges repel.
What is the scientific term that describes the electrons in a metal when a current flows through it?
Delocalised
Free
Random
Open
What causes resistance?
Electrons colliding with ions in the insulator
Electrons colliding with ions in the conductor
Protons colliding with ions in the conductor
Protons colliding with ions in the insulator
Which term describes the relationship between resistance and the cross section of a wire?
Logarithmic
Inversely proportional
Directly proportional
Not proportional
