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WorksheetsElectricity (EM)
Total questions: 70
Worksheet time: 28mins
If you rub two balloons with a piece of wool. What will happen when the balloons are brought near each other?
The balloons will pop.
The balloons will become positively (+) charged.
The balloons will repel each other.
The balloons will attract each other.
Nothing
When socks get stuck to towels in your dryer, this is an example of
static electricity
current electricity
voltage
resistance
What types of charges attract?
Negative and Neutral
Positive and Negative
Positive and Neutral
Positive and Positive
The potential difference that causes charges to move in a circuit is
(a)
How do electrons differ from protons?
Protons are neutral
Electrons hold a negative charge and protons hold a positive charge.
Electrons are positively charged and protons are negatively charged.
They are the same thing
Electric charges that are different (a) each other.
What charge does a proton have?
(a)
What charge does an electron have?
(a)
If a substance has a higher number of electrons than protons on its surface, what type of charge does it have?
A neutral charge
A positive charge.
A negative charge.
No charge at all
Which of the following is caused by static electricity?
a stove getting hot when it is turned on
a light bulb coming on when a switch is turned on
a lightning strike during a storm
a magnet being attracted to a refrigerator
Lighting is a form of ------ electricity.
(a)
Why can you get a shock if you touch a metal doorknob after walking across a wool carpet?
You have gained neutrons; the doorknob has fewer electrons.
You have lost electrons; the doorknob has many electrons.
You have gained electrons; the doorknob has no electrons.
You have gained electrons; the doorknob has many electrons.
An object becomes negatively charged by gaining ------
(a)
An object becomes positively charged by losing
(a)
What method of static charging is shown in this picture
Polarization
Friction
Induction
Conduction
If you rub a glass rod with a piece of silk, the rod becomes positively charged. This means that
friction destroyed electrons in the rod.
the silk has become negatively charged.
protons have moved to the rod.
glass attracts more protons.
Electricity is the flow of
(a)
Electrons are actually parts of
atoms
protons
electrical wires
measurement
_________________ allow electricity to flow through easily.
Conductors
Resistors
Capacitors
Insulators
______________ do not allow electricity to flow through easily.
Insulators
Conductors
Resistors
Capacitors
A measure of the rate of energy transfer over a unit of time
(a)
A unit of measure of the rate of electron flow or current in an electrical conductor.
(a)
An example of a voltage source is a _____.
voltmeter
battery
resistance
switch
The flow/movement of electric charges is
Voltage
Current
Resistance
Circuit
A closed path that electric current follows is a
Voltage
Resistance
Current
Circuit
The tendency for a material to oppose the flow of electrons, changing electrical energy into thermal energy and light.
Voltage
Current
Resistance
Circuit
What type of circuit is this?
(a)
What type of circuit is this?
(a)
What is this symbol?
(a)
What is this symbol?
(a)
What is this symbol?
(a)
When a switch is (a) , electric current can move through the circuit.
When the switch is (a) , there is no current running through the circuit
How do wires work?
they become an electrical charge
they keep the charge from moving randomly
they bend electricity easily
they allow a current of electricity to flow
The measure of resistance in an electrical circuit is
(a)
What metal is used for electrical wires?
(a)
Changes in polarity happen at speed which is measured in
Amps
Hertz
Watts
Ohms
Volts
What does the abbreviation AC stand for?
(a)
What does the abbreviation DC stand for?
(a)
When potential energy is converted to kinetic energy, the total amount of energy...
is increased
remains the same
is decreased
This is (a) energy.
This is (a) energy.
This is (a) energy.
This is (a) power.
As the resistance of a circuit increases, the current will
(a)
What is the name of this component?
(a)
Which of these does NOT conduct electricity?
Gold
Silver
Carbon
Rubber
Will this circuit work?
Yes
No
What is the following component?
(a)
Why is there a plastic coating around a metal wire?
to increase the flow of electricity
to insulate electricity
to keep the wire warm
to conduct electricity
Why is electrical wire made from metal?
to insulate electricity
so they can bend easily
to conduct electricity
because metal is cheap
Which formula is used to calculate voltage?
V = I/R
V = R/I
V = IR
V = P/R
Which formula is used to calculate current?
I = V/R
I= VR
I = RV
I = R/V
Which formula is used to calculate resistance?
R = VI
R = V/I
R = P/V
R = I/V
A 9 Volt battery and a 2 Ohm bulb are in a circuit. Calculate the current (Amps) of the circuit.
(a)
Adding a resistor will have this effect on a circuit.
Speed up the current
Stop the current
Have no effect on the current.
Slow down the current
____________ allows electricity to flow.
A conductor
An insulator
A magnet
____________ stops the flow of electricity.
A conductor
An insulator
A magnet
The Electric Force is strongest when charges are...
close together
far apart
the electric force is constant everywhere
How is electricity generated in a battery?
through kinetic energy
by the flow of particles
by a chemical reaction
through a solar reaction
What size resistor would produce a 3 Amp current flow with a 12 Volt battery ----(Ohms)
(a)
How many Volts would we need to produce a current flow of 8 Amps through a 6 Ohm resistor
(a)
This circuit has a 24 volt battery and the resistor is 8 ohms. How many amps are running through the circuit?
(a)
The current through this circuit is:
0´02 A
0´2 A
0´02 V
5 A
What is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?
(a)
What resistance (Ώ) is needed to cause a 20A current flow because of a 100V battery?
(a)
The current through �2R2 is:
0´2 C
0´02 A
5 A
0´2 A
The process of removing the excess charge on an object by means of the transfer of electrons between it and another object
Grounding
Conduction
Friction
Induction
What is the charge on the balloon?
-7
-3
+3
-10
How did the balloon get the overall charge it has?
gained protons
lost protons
lost electrons
gained electrons
