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WorksheetsCambridge Checkpoint Science 9: Electricity
Total questions: 46
Worksheet time: 2hrs 32mins
The student's hair is standing up when he is touching a "Van de Graaf" generator because
it makes it easier for his mother to give him a "coronavirus lockdown" haircut
positive charges have moved into his hair from the generator
positive charges have move into the generator away from his hair
negative charges have moved into his hair from the generator
negative charges have moved into both his hair and the generator
What type of charged objects REPEL each other when brought close together?
(Choose all that apply)
north and south
positive and positive
negative and positive
negative and negative
north and north
What force causes an object to become charged when it is rubbed?
Electrostatic Force
Coulomb's Force
May the Force
Friction Force
Magnetic Force
When a balloon is rubbed on your hair, both become charged because
positive charges are transferred from one object to another
electrons are transferred from one object to another
both objects gain positive charges
both objects gain electrons
The unit of electrical charge is the
Volt
Ampere
Coulomb
Ohm
Joule
If you are caught in the open outside during a thunderstorm, the safest measure to take is to:
use an umbrella
stand under the nearest tree
make yourself as low as possible
take a selfie of yourself with lightning in the background
How is a conductor different from an insulator?
A conductor works with an orchestra, whereas an insulator works on a building site
Electric charges move freely on insulators but not with conductors
Conductors have electrons; insulators do not
Conductors do not have free electrons, but insulators do, so the electrons can move easily in insulators
In a conductor, electric current can flow freely; in an insulator, it cannot flow freely
Which way do electrons flow?
From negative to positive
From positive to negative
from negative to negative
From positive to positive
The unit used to measure electric current
Ohms
Ampere
Coulomb
Ammeter
Volt
In a closed circuit, what actually happens when current flows?
electrons leave the cell, quickly rush through the circuit, then go back to the cell
positive charges leave the cell, quickly rush through the circuit, then go back to the cell
electrons in the circuit are "pushed" from the negative end, and attracted to the positive end of the cell.
positive charges in the circuit are "pushed" from the positive end, and attracted to the negative end of the cell.
In a circuit, conventional current flows from
positive to negative
negative to positive
positive to positive
negative to negative
from the battery to the lamp
This symbol represents an
a meter
ameter
amp meter
ammeter
amp eater
How is an ammeter connected in a circuit?
In series: "end to end" like holding hands
In series: "side by side" like hugging
In parallel: "end to end" like holding hands
In parallel: "side by side" like hugging
When connecting an ammeter in a circuit, you must
always connect it next to the battery
break the circuit, then insert it into the circuit
always connect it after the main circuit is completed
always wash your hands first
This symbol represents a
voltmeter
volt meter
voltemeter
volt eater
voltimeter
How is a voltmeter connected in a circuit?
In series: "end to end" like holding hands
In series: "side by side" like hugging
In parallel: "end to end" like holding hands
In parallel: "side by side" like hugging
When connecting either an ammeter or a voltmeter in a circuit, it is important to connect them (select all that apply)
negative to negative
negative to positive
positive to negative
positive to positive
When connecting a voltmeter in a circuit, you must
always connect it next to the battery
break the circuit, then insert it into the circuit
always connect it after the main circuit has been set up.
always wash your hands first
The three components shown in the circuit are:
Cell
Battery
Lamp
Resistor
Open switch
Resistance is measured in what unit?
(a)
The correct symbol used to state the value of resistance is:
A device which impedes (slows down) the flow of charge is called a
re - sister
resistor
resist or
register
The greater the resistance
the lower the current
the higher the current
current stays the same
Which of the following graphs best shows the voltage-current relationship that would exist through the component shown above?
The three components shown in the circuit are:
Cell
Battery
Resistor
Variable Resistor
Loudspeaker
The diagram shows the set-up for investigating resistance wire. What happens to the resistance as the length of the wire is increased?
Resistance decreases
Resistance stays the same
Resistance increases
Lights strung together in a line along a circuit would be an example of a _____ circuit.
short
parallel
series
resistor
What would happen if one of the lamps in the circuit shown does not work?
The circuit would be closed
The remaining lamps would be dimmer
The remaining lamps would be brighter
None of the remaining lamps would light up
Are the three lamps shown, connected in series or parallel?
series
parallel
neither
In the photo above, the meter showing a value of 0.14 is connected in.........,
and the meter showing a value of 1.37 is connected in ......... to the lamp.
series, series
series, parallel
parallel, series
parallel, parallel
Are the four lamps shown, connected in series or parallel?
series
parallel
neither
Which of the two circuits would have the brightest bulbs?
A
B
As more lamps are connected in a series circuit, the total current in the circuit
decreases.
increases.
remains the same.
As more lamps are connected to a series circuit, the total resistance of the circuit
decreases.
increases.
remains the same.
As more lamps are connected to a parallel circuit, the total current in the circuit
decreases.
increases.
remains the same.
As more lamps are added to a parallel circuit, the total resistance
decreases.
increases.
remains the same.
What is the name of an electrical circuit in which the current flows through two or more separate paths?
Single Circuit
Series Circuit
Parallel Circuit
Double Circuit
What is the name of an electrical circuit in which the electric current passes through each circuit element in order.
Single Circuit
Series Circuit
Parallel Circuit
Double Circuit
In a series circuit, which of the following quantity remains the same anywhere in the circuit?
Current
Current and Voltage
Voltage
None
In a circuit of lamps connected in parallel, which of the following quantity remains same for each lamp?
Current
Current and Voltage
Voltage
None
What would happen if one of the lamps in the circuit shown does not work?
The remaining lamps will still work
The remaining lamps will not work
Only the lamps to the left of the one not working, will work.
Only the lamps to the right of the one not working, will work.
In the circuit shown, if A1 reads 0.6A, and the two lamps are identical, then
A2 would read 0.5A and A3 would read 0.4A
A2 would read 0.4A and A3 would read 0.2A
A2 would read 0.3A and A3 would read 0.0A
A2 would read 0.6A and A3 would read 0.6A
In the circuit shown, if A1 reads 0.6A, and the two lamps are identical, then
A2 would read 0.5A and A3 would read 0.1A
A2 would read 0.4A and A3 would read 0.2A
A2 would read 0.3A and A3 would read 0.3A
A2 would read 0.6A and A3 would read 0.6A
In the circuit shown, if V1 reads 3.0V, and the two lamps are identical, then
V2 would read 2.0V and V3 would read 1.0V
V2 would read 1.0V and V3 would read 2.0V
V2 would read 1.5V and V3 would read 1.5V
V2 would read 3.0V and V3 would read 3.0V
In the circuit shown, if V1 reads 3.0V, and the two lamps are identical, then
V2 would read 2.0V and V3 would read 1.0V
V2 would read 1.0V and V3 would read 2.0V
V2 would read 1.5V and V3 would read 1.5V
V2 would read 3.0V and V3 would read 3.0V
