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WorksheetsElectrostatics and Circuits
Total questions: 50
Worksheet time: 1hrs 22mins
Name
Class
Date
1.
Which of the following is NOT a situation caused by static electricity?
a)
hair stands on end when touching a static electricity generator
b)
you get a electric shock when touching a doorknob during dry winter
c)
your hair stands on end when you are frightened
d)
clothes in the dryer cling to one another when no fabric softener is used
2.
The transfer of what type of atomic particle is responsible for the static charges on objects?
a)
neutrons
b)
protons
c)
electrons
d)
none of these
3.
An object that is positively charged contains an excess of:
a)
protons
b)
neutrons
c)
electrons
d)
positrons
4.
What types of charges attract?
a)
Positive and Positive
b)
Positive and Neutral
c)
Negative and Neutral
d)
Positive and Negative
5.
The buildup of charges on an object is called:
a)
positive charge
b)
static charge
c)
negative charge
d)
static discharge
6.
Walking across a carpet is an example of charge being transferred by
a)
friction.
b)
induction.
c)
contact.
d)
static electricity
7.
The difference between attract and repel is that to attract is to pull something closer and repel is to push something away.
a)
True
b)
False
8.
If a substance has a higher number of electrons than protons on its surface, what type of charge does it have?
a)
A positive charge.
b)
A negative charge.
c)
A neutral charge
d)
No charge at all
9.
Method of charging an object by allowing electric charge to flow by direct contact from one object to another object.
a)
friction
b)
conduction
c)
electric force
d)
induction
10.
Ms Jo Jo rubbed two balloons with a piece of wool. What will happen when the balloons are brought near each other?
a)
The balloons will pop.
b)
The balloons will attract each other.
c)
The balloons will become positively (+) charged.
d)
The balloons will repel each other.
11.
The person whose finger is shown has walked across a carpet and is about to touch the doorknob.
Are the charges in the doorknob attracted or repelled by the charges in the finger.
Are the charges in the doorknob attracted or repelled by the charges in the finger.
a)
The are attracted leaving one end of the doorknob with a negative charge
b)
The are repelled leaving one end of the doorknob with a positive charge
12.
If an object has the same number of positive and negative charges, its electrical charge is...
a)
positive
b)
negative
c)
neutral or no charge
d)
opposite
13.
A conductor is?
a)
material that current can pass through easily
b)
material that current cannot pass through easily
c)
magnet
d)
electric current
14.
A method to create or generate static electricity in a material by bringing an electrically charged object near it.
a)
induction
b)
polarization
c)
neutralization
d)
conduction
15.
Where do electrons go when you rub a balloon on your hair?
a)
Onto the balloon
b)
Into your hair
c)
They don't go anywhere (they remain stationary)
d)
Into the air
16.
What is the unit for current?
a)
volts
b)
amperes (amps)
c)
ohms
d)
watts
17.
What is the unit for voltage?
a)
volts
b)
amperes (amps)
c)
ohms
d)
watts
18.
What is the unit for resistance?
a)
volts
b)
amperes (amps)
c)
ohms
d)
watts
19.
Bits of paper are attracted to the surface of this balloon. What attracts the paper pieces to the balloon?
a)
Friction
b)
Static Electricity
c)
Magnetism
d)
Potential Energy
20.
Which light will be brighter and why?
a)
Bulb A because its circuit is closed
b)
Bulb B because it has more resistance
c)
Bulb B because it has more voltage
d)
Bulb A because it has less voltage
21.
If a material does not allow charges to move through it easily, what is it called?
a)
An electrical insulator
b)
An electrical conductor
c)
A resistor
d)
A capacitor
22.
Materials that cut down or resist the flow of charges are called?
a)
conductors
b)
insulators
c)
resistors
d)
circuts
23.
Pick the correct sentence.
a)
This circuit will work because it is a closed circuit.
b)
Energy will freely flow in this circuit.
c)
This circuit will not work because there is no energy source.
d)
This circuit will not work because there is no switch.
24.
What does the resistance of a wire tell you?
a)
The speed of electron flow through it.
b)
How tough it is for electrons to flow through it.
c)
The amount of energy given to the electrons.
d)
The amount of energy taken away from the electrons.
25.
An example of a conductor is :
a)
a glass paperweight
b)
a plastic cap
c)
a metal screw
d)
a wooden handle
26.
An example of an insulator is:
a)
iron
b)
silver
c)
copper wire
d)
rubber
27.
What is the continuous movement of electrons called?
a)
static electricity
b)
current electricity
c)
friction
d)
power
28.
How much voltage is needed to create a current of 12 A in a circuit with a resistance of 5 ohms?
a)
2.5 V
b)
60 V
c)
120 A
d)
60 ohms
29.
What happens to voltage in a circuit if the current remains the same and the resistance is decreased?
a)
Voltage will increase
b)
Voltage will decrease
c)
Voltage will remain unchanged
30.
Which of the following would increase the electrical resistance in a wirte?
a)
Use a less dense material for the wire
b)
Shorten the length of the wire
c)
Increase the diameter of the wire
d)
Increase the temperature of the wire
31.
Good conductors
a)
Have low resistance
b)
Allow electrons to flow easily
c)
Are frequently made from metals
d)
All of the above
32.
According to this law, the current in a circuit equals the voltage difference divided by the resistance.
a)
Law of Conservation of Energy
b)
Ohm's Law
c)
Law of Conservation of Charges
d)
Newton's First Law
33.
If the battery produced 12.6 Volts what would be the current flow for a 6 Ohm resistor?
a)
2.1 Amps
b)
2.4 Amps
c)
1.71 Amps
d)
15 Amps
34.
How many Volts would we need to produce a current flow of 8 Amps through a 6 Ohm resistor
a)
12 volts
b)
24 volts
c)
1.3333
d)
48 volts
35.
A Charging system producing 14.5 Volts with a current flow of 43.5 Amps, what is the circuit resistance
a)
58 Amps
b)
0.33 Amps
c)
13 Amps
d)
1 Amp
36.
What size resistor would produce a 3 Amp current flow with a 12 Volt battery
a)
1 Ohm
b)
3 Ohms
c)
4 Ohms
d)
12 Ohms
37.
With the engine running the charging system produces 14.5 Volts what would the current flow be if a resistance of 6 Ohms was present
a)
2.41 Ohms
b)
2.52 Ohms
c)
2.1 Ohms
d)
0.3333 Ohms
38.
A Charging system producing 14.5 Volts with a current flow of 43.5 Amps, what is the circuit resistance
a)
58 Amps
b)
0.33 Amps
c)
13 Amps
d)
1 Amp
39.
If a 2 Ω resistor is connected to 12 V, what is the current through the resistor? (I=V/R) ***You will need to show the work for this problem on paper***
a)
3 A
b)
4 A
c)
5 A
d)
6 A
40.
If a 15 Ω resistor is connected to 30 V, what is the current through the resistor? (I=V/R) ***You will need to show the work for this problem on paper***
a)
2 A
b)
4 A
c)
6 A
d)
8 A
41.
If a current of 3 A flows through a resistor connected to 90 V, what is the resistance? (R=V/I) ***You will need to show the work for this problem on paper***
a)
3 Ω
b)
20 Ω
c)
30 Ω
d)
90 Ω
42.
What would happen to the current in a circuit if the voltage decreased? (V=IR)
a)
Increase
b)
Decrease
c)
Remain the same
43.
A point charge of +3.0 X 10-7 coulomb is placed 2.0 X 10-2 meter from a second point charge of +4.0 X 10-7 coulomb. What is the magnitude of the electrostatic force on the charges?
a)
6.0 X 10-12 N
b)
3.0 X 10-10 N
c)
5.4 X 10-2 N
d)
2.7 N
44.
What is the magnitude of the electrostatic force that a charge of +3.0 X 10-5 coulomb exerts on a charge of +6.0 X 10-6 coulomb that is 0.30 meter away?
a)
1.8 X 10-3 N
b)
5.4 X 10-2 N
c)
5.4 X 100 N
d)
1.8 X 101 N
45.
Which of the following procedures will double the force on two point charges?
a)
halving the distance between the charges
b)
doubling the magnitude of one charge
c)
halving the magnitude of one charge
d)
doubling the distance between the charges
46.
If the distance doubles, what happens to the force?
a)
Reduced by half
b)
Reduced by 1/4
c)
Stays the same
d)
Quadruples
47.
What voltage is needed to cause a 2A current flow through a 10Ω resistor?
a)
5V
b)
0.2V
c)
20V
d)
200V
48.
1. You have a flashlight with a 1.5V battery and an incandescent lamp that draws 0.2A. What is the filament resistance?
a)
3 ohms
b)
75 ohms
c)
7.5 ohms
d)
.133 ohms
49.
I am the negatively charged particle in an atom. I can move freely. I can be released, shared, or “stolen” from an atom. Who am I?
a)
proton
b)
neutron
c)
electron
50.
What method of static charging is shown in this picture
a)
Polarization
b)
Friction
c)
Induction
d)
Conduction
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