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Worksheets210308 s3 electricity
Total questions: 109
Worksheet time: 55mins
Name
Class
Date
1.
___ is the ability to work. The unit of energy is Joule (J).
a)
energy
b)
power
c)
force
d)
labor
2.
___ is the energy of an object due to its motion.
a)
kinetic energy
b)
potential energy
c)
chemical energy
d)
light energy
3.
___ is the energy due to its position or condition.
a)
potential energy
b)
chemical energy
c)
kinetic energy
d)
sound energy
4.
___ is the energy stored in substances such as food and fuels.
a)
chemical energy
b)
sound energy
c)
potential energy
d)
heat energy
5.
___ is produced by vibrating objects.
a)
sound energy
b)
chemical energy
c)
light energy
d)
electrical energy
6.
___ is the energy found in hot objects.
a)
heat energy
b)
nuclear energy
c)
electrical energy
d)
light energy
7.
___ is the energy radiated by luminous objects.
a)
light energy
b)
nuclear energy
c)
heat energy
d)
electrical energy
8.
___ consists of electric charges traveling through electric conductors.
a)
electrical energy
b)
nuclear energy
c)
light energy
d)
heat energy
9.
___ is the energy stored in the nucleus of an atom.
a)
nuclear energy
b)
chemical energy
c)
light energy
d)
heat energy
10.
Which of the following is NOT one of the reasons why we generate electricity.
a)
Electricity provides solution to problems such poverty and hunger
b)
Electricity provides convenient source of energy
c)
Electricity is one of the most versatile forms of energy
d)
Electricity provides a fast source of energy
11.
Electricity could be in a ___ form or as a ___.
a)
static , current
b)
flow, current
c)
dynamic, current
d)
static, dynamic
12.
A ___ is a device that converts mechanical energy into electrical power for use in an external circuit.
a)
generator
b)
battery
c)
hydro
d)
pump
13.
Who invented the generator?
a)
Michael Faraday
b)
Georg Simon Ohm
c)
Andre-Marie Ampere
d)
Alessandro Volta
14.
Which of the following is NOT one of the things needed to make a generator for electricity?
a)
battery
b)
magnets
c)
wire
d)
rotor
15.
Generators in ___ are huge in order to supply electricity to factories, homes and schools.
a)
power stations
b)
dynamos
c)
machines
d)
solar panels
16.
In a power station, energy sources such as steam and water creates mechanical energy to turn a ___ to turn the generator.
a)
turbine
b)
machines
c)
solar panels
d)
wind mills
17.
Which of the following energy sources to generate electricity is NOT environmentally friendly.
a)
oil
b)
geothermal
c)
waves
d)
biomass
18.
Which of the following does NOT belong to the group of sources of energy to produce electricity.
a)
herb
b)
biomass
c)
hydro
d)
natural gas
19.
Which of the following does NOT belong to the group of sources of energy to produce electricity.
a)
flag
b)
propane
c)
solar
d)
petroleum
20.
Which of the following does NOT belong to the group of sources of energy to produce electricity.
a)
concrete
b)
wind
c)
coal
d)
geothermal
21.
There are ___ kinds of electrical current
a)
2
b)
1
c)
3
d)
4
22.
What are the kinds of electric current?
a)
direct, alternating
b)
ampere, direct
c)
alternating, dropped
d)
alternating, dry
23.
___ is an electric current that reverses its direction many times a second at regular intervals.
a)
alternating current
b)
direct current
c)
voltage
d)
open circuit
24.
___ is an electric current flowing in one direction only.
a)
direct current
b)
alternating current
c)
voltage
d)
closed circuit
25.
(See Figure) What kind of generator model is shown in the diagram?
a)
DC
b)
AC
c)
BC
d)
AD
26.
(See Figure) What kind of generator model is shown in the diagram?
a)
AC
b)
DC
c)
BC
d)
AD
27.
___ is generally used for power distribution, used in our homes and at work to provide power whatever is needed.
a)
AC
b)
DC
c)
BC
d)
AD
28.
___ is more widely used for the electronic boards, batteries, and for many other applications.
a)
DC
b)
AC
c)
BC
d)
AD
29.
What does AC stand for?
a)
alternating current
b)
ampere current
c)
allowable current
d)
alternating circuit
30.
What does DC stand for?
a)
direct current
b)
direct circuit
c)
dropped current
d)
dry circuit
31.
You have a wire and a magnetic field between magnets (N and S). What will you do to induce an electric current?
a)
move the wire up & down inside the magnetic field
b)
rotate the wire anticlockwise inside the magnetic field
c)
put the wire inside the magnetic field
d)
coil the wire inside the magnetic field
32.
In the `right-hand rule`, the ___ represents the motion of the wire.
a)
thumb
b)
forefinger
c)
middle finger
d)
little finger
33.
In the `right-hand rule`, the ___ gives the direction of magnetic field, middle finger gives the direction of the current.
a)
forefinger
b)
middle finger
c)
thumb
d)
little finger
34.
In the `right-hand rule`, the ___ gives the direction of the current.
a)
middle finger
b)
thumb
c)
forefinger
d)
little finger
35.
(See Figure) What is the direction of the magnetic field?
a)
i to j
b)
j to i
c)
c to d
d)
clockwise
36.
(See Figure) The wire rotates in clockwise motion. What is the direction of the current?
a)
d-e-f
b)
g-f-e
c)
d-c-b
d)
i to j
37.
(See Figure) To produce electricity, which of the following is an appropriate diagram?
a)
solar - steam - turbine - electricity
b)
biomas - combustion - battery - electricity
c)
coal - combustion - turbine - electricity
d)
waves - steam - turbine - electricity
38.
Who are the scientists that gave their names to electrical units that have these symbols, V, A, and Ω?
a)
Georg Simon Ohm, Alessandro Volta, Andre-Marie Ampere
b)
Andre-Marie Ampere, Michael Faraday, Alessandro Volta
c)
Alessandro Volta, James Prescott Joule, Andre-Marie Ampere
d)
Alessandro Volta, Andre-Marie Ampere, Charles-Augustin Coulomb
39.
Who invented the battery?
a)
Alessandro Volta
b)
Georg Simon Ohm
c)
Andre-Marie Ampere
d)
Michael Faraday
40.
___ is an electrical instrument used to measure
a)
ohmmeter
b)
rheostat
c)
ammeter
d)
voltmeter
41.
___ is an electrical instrument used to control a current by varying the resistance.
a)
rheostat
b)
ohmmeter
c)
ammeter
d)
voltmeter
42.
___ is a measuring instrument used to measure the current in a circuit.
a)
ammeter
b)
rheostat
c)
ohmmeter
d)
voltmeter
43.
___ is an instrument for measuring electric potential in volts.
a)
voltmeter
b)
rheostat
c)
ohmmeter
d)
ammeter
44.
___ is an instrument for measuring voltage, resistance, and current.
a)
multimeter
b)
rheostat
c)
ohmmeter
d)
ammeter
45.
It’s an instrument for detecting and measuring small electric currents.
a)
galvanometer
b)
ohmmeter
c)
ammeter
d)
voltmeter
46.
To illustrate how electricity works, the water tank in the picture shown represents the ___.
a)
voltage
b)
resistance
c)
current
d)
turbine
47.
To illustrate how electricity works, the stone above the hose in the picture shown represents the ___.
a)
resistance
b)
current
c)
voltage
d)
turbine
48.
To illustrate how electricity works, the water in the picture shown represents the ___.
a)
current
b)
voltage
c)
resistance
d)
turbine
49.
___ is the potential difference across two points or the electrical energy supply needed to move each unit of charge from one point to another.
a)
voltage
b)
resistance
c)
current
d)
turbine
50.
___ is the rate of flow of electrons/ charges through a conductor.
a)
current
b)
voltage
c)
resistance
d)
turbine
51.
___ is anything that resists the flow of electrons.
a)
resistance
b)
current
c)
voltage
d)
turbine
52.
The speed of electricity is measured in what?
a)
amperes
b)
ohms
c)
volts
d)
resistance
53.
The force of electricity is measured in what?
a)
volts
b)
ohms
c)
amperes
d)
velocity
54.
`The water passing through the hose.` This illustration best describes ___.
a)
current
b)
voltage
c)
resistance
d)
turbine
55.
`The stone placed above the hose resists the flow of water.` This illustration best describes ___.
a)
resistance
b)
current
c)
voltage
d)
turbine
56.
`Water is elevated so that the water can flow due to gravity.` This illustration best describes ___.
a)
voltage
b)
resistance
c)
current
d)
turbine
57.
In electricity, ___ are materials that allow the flow of electrons.
a)
conductors
b)
insulators
c)
resistance
d)
current
58.
An electrical current doesn’t flow through other materials. These materials are ___.
a)
insulators
b)
conductors
c)
resistance
d)
current
59.
In electricity, which of the following DOES NOT belong to the group.
a)
wood
b)
silver
c)
copper
d)
gold
60.
In electricity, which of the following DOES NOT belong to the group.
a)
rubber
b)
bronze
c)
steel
d)
iron
61.
In electricity, which of the following DOES NOT belong to the group.
a)
iron
b)
rubber
c)
glass
d)
plastic
62.
In electricity, which of the following DOES NOT belong to the group.
a)
copper
b)
wood
c)
paper
d)
cotton
63.
In Ohm’s law, if ___ increases, current increases, and ___ stays the same.
a)
voltage ; resistance
b)
resistance ; voltage
c)
current ; voltage
d)
voltage ; current
64.
In Ohm’s law, if resistance increases, ___ decreases, and ___ stays the same.
a)
current ; voltage
b)
voltage ; current
c)
voltage ; resistance
d)
resistance ; voltage
65.
___ is dependent on ___ and resistance.
a)
current ; voltage
b)
voltage ; current
c)
voltage ; resistance
d)
resistance ; voltage
66.
What is the voltage of a circuit with 10A of current and 20Ω of resistance?
a)
200V
b)
30V
c)
15V
d)
350V
67.
A 9V battery is connected to a circuit. The measured current is 2A. What is the equivalent resistance?
a)
4.5Ω
b)
0.22Ω
c)
3.5Ω
d)
2.5Ω
68.
(See Figure) The manipulated variable is ___
a)
voltage
b)
current
c)
resistance
d)
wire
69.
(See Figure) The responding variable is ___
a)
current
b)
voltage
c)
resistance
d)
wire
70.
(See Figure) The constant variable is ___
a)
type of wire coil
b)
current
c)
voltage
d)
power
71.
__ is when electrons are pushed away from the negative terminal and attracted towards the positive terminal.
a)
electron flow
b)
conventional flow
c)
current flow
d)
normal flow
72.
__ is when current flow from the positive terminal to the negative terminal of an energy source.
a)
conventional flow
b)
electron flow
c)
current flow
d)
normal flow
73.
(See Figure) Will the bulb glow in this circuit?
a)
never
b)
yes, all the time
c)
maybe
d)
I don't know
74.
How long will the electrical energy keep flowing in this electrical circuit? Which of the following statements is WRONG?
a)
until voltage stops moving
b)
as long as the circuit is connected
c)
until the battery is drained
d)
until the bulb is busted
75.
Which of the following is NOT one of the reasons why you should never connect the positive and negative terminals of a battery directly.
a)
bulb will explode
b)
lights will not glow
c)
battery will drain faster
d)
battery might explode
76.
It is the path along which electric current can flow.
a)
electric circuit
b)
open circuit
c)
closed circuit
d)
generator
77.
A ___ is one that is complete, with good continuity throughout.
a)
closed circuit
b)
open circuit
c)
generator
d)
turbine
78.
An ___ is one where the continuity has been broken by an interruption in the path for current to flow.
a)
open circuit
b)
closed circuit
c)
generator
d)
turbine
79.
A device designed to open or close a circuit under controlled conditions is called a ___.
a)
switch
b)
bulb
c)
dynamo
d)
generator
80.
Which is NOT one of the answers to how long will the electrical energy keep flowing in the electrical circuit?
a)
As long as the circuit remains open circuit
b)
As long as the circuit is connected
c)
As long as the circuit remains closed circuit
d)
Until the battery is drained
81.
Which is NOT one of the answers to why you should never connect the positive and negative terminals directly?
a)
Light will glow dim
b)
Light will not glow
c)
The battery will drain faster
d)
The battery might explode
82.
A ___ is a simplified conventional graphical representation of an electrical circuit.
a)
circuit diagram
b)
electrical doodle
c)
current graph
d)
artwork
83.
(See Figure) Component D is a ___.
a)
variable resistor
b)
cell
c)
variable rheostat
d)
fuse
84.
(See Figure) Component C is a ___.
a)
variable resistor
b)
cell
c)
variable rheostat
d)
fuse
85.
___ is an electrical safety device that operates to provide overcurrent protection of an electrical circuit.
a)
fuse
b)
thermistor
c)
transformer
d)
capacitor
86.
___ is a type of resistor whose resistance is dependent on temperature, more so than in standard resistors.
a)
thermistor
b)
transformer
c)
capacitor
d)
fuse
87.
___ increases (steps up) or decreases (steps down) an electrical voltage.
a)
transformer
b)
thermistor
c)
capacitor
d)
fuse
88.
___ stores energy, but generally releases its energy much more rapidly than the battery.
a)
capacitor
b)
transformer
c)
thermistor
d)
fuse
89.
What are the two kinds of electrical circuits?
a)
series and parallel
b)
conventional and electron
c)
voltage and current
d)
open and close
90.
If one bulb is spoiled or removed from a complete ___, the circuit becomes incomplete and no current is allowed to flow through the circuit. The other bulb will not light up.
a)
series circuit
b)
parallel circuit
c)
open circuit
d)
close circuit
91.
Which one describes the current that flows to a series circuit.
a)
A current that flows at every point in a circuit is the same.
b)
I = I1 + I2 + I3 ...
c)
The current across the circuit is equal to the sum of the current across each bulb.
d)
The effective current of the circuit is equal to the sum of the current of the bulbs in the circuit.
92.
Which is not true in the statements about series circuit.
a)
The voltage across the circuit is equal throughout the circuit.
b)
A current that flows at every point in a circuit is the same.
c)
The effective resistance of the circuit is equal to the sum of the resistance of the bulbs in the circuit.
d)
The voltage across the circuit is equal to the sum of the voltage across each bulb.
93.
The current in a series circuit ___ as the number of components connected ___.
a)
decreases ; increases
b)
increases ; decreases
c)
closes ; opens
d)
opens ; closes
94.
If you have a set of lights in series, what would happen if you remove a bulb?
a)
the other bulbs turn off
b)
the other bulbs get dimmer
c)
the other bulbs stay the same brightness
d)
the other bulbs get brighter
95.
The resistance in the parallel circuit is described as ___.
a)
1/R = 1/R1 + 1/R2 ...
b)
R = 1/R1 + 1/R2 ...
c)
1/R = R1 + R2 ...
d)
R = R1 + R2 ...
96.
If unplugging one bulb from a circuit has no effect on the other bulbs in circuit, you have a ___.
a)
parallel connection
b)
open circuit
c)
series connection
d)
closed circuit
97.
In ___, the current from the source flows through the wire in two separate paths.
a)
parallel connection
b)
series connection
c)
open connection
d)
closed connection
98.
Circuits with microchips and other devices are known as ___.
a)
electronic circuits
b)
integrated board
c)
mother board
d)
computer chip
99.
Which of the following does NOT have electronic circuits?
a)
electric fan
b)
television
c)
computer
d)
mobile phones
100.
___ control the level of current and voltage through its resistance that is usually marked on it with colored rings.
a)
resistors
b)
diodes
c)
transistors
d)
thermistor
101.
___ change AC power to DC by allowing current to flow through 1 direction only.
a)
diodes
b)
transistors
c)
resistors
d)
thermistor
102.
___ are used to amplify signals.
a)
transistors
b)
resistors
c)
diodes
d)
thermistor
103.
___ contain complete circuits, with resistors, diodes, and other components formed on a tiny chip of silicon only a few sq.mm.
a)
microchips
b)
transistors
c)
resistors
d)
diodes
104.
___ is the rate at which energy is transferred
a)
electric power
b)
electrical energy
c)
electrical current
d)
horsepower
105.
Power is measured in terms of ___.
a)
J/s
b)
V
c)
W/s
d)
kph
106.
A blender of 0.5 kW runs 4 hours per month. The electric company charges 0.07 Baht per kilowatt hour. How much does it cost to run the blender that month?
a)
0.14 Baht
b)
0.26 Baht
c)
2.1 Baht
d)
1.3 Baht
107.
Most components have a ___ for maximum power they can dissipate, and it’s important to keep them operating under that value.
a)
rating
b)
double insulation
c)
diodes
d)
transistors
108.
There are resistors built to handle large power drops. These are specifically called out as ___. These large resistors are built to dissipate lots of power.
a)
power resistors
b)
double insulators
c)
power diodes
d)
power transistors
109.
(See Figure) Which of the following is a symbol for double insulation?
a)
C
b)
D
c)
B
d)
A
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