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Unit 5 Electricity Review

Total questions: 83

Worksheet time: 1hrs 2mins

Name
Class
Date
1.

The amount of "push" available to move electrons is _____

a)

Current

b)

Resistance

c)

Voltage

d)

Static Electricity

2.

A method used to charge an object without actually touching the object to any other charged object.

a)

Induction

b)

Conduction

c)

Friction

d)

Grounding

3.

States that the total amount of charge among the objects is the same before the process starts as after the process ends

a)

Law of Conservation of Charge

b)

Law of Conservation of Energy

c)

Static Electricity

d)

Static Discharge

4.

A negatively charged material has ___________ electrons.

a)

gained

b)

lost

5.

The process of removing the excess charge on an object by means of the transfer of electrons between it and another object

a)

Grounding

b)

Conduction

c)

Induction

d)

Friction

6.

Occurs when there is a buildup of electric charge on the surface of a material

a)

Static Electricity

b)

Grounding

c)

Induction

d)

Conduction

7.

A positively charged material has __________ electrons

a)

lost

b)

gained

8.

A transfer of electrons between the two objects that are rubbed together

a)

Friction

b)

Conduction

c)

Induction

d)

Grounding

9.

The contact of a charged object to a neutral object

a)

Conduction

b)

Induction

c)

Friction

d)

Grounding

10.

The loss of static electricity as electric charges moves off an object is called

a)

Static Electricity

b)

Induction

c)

Static Discharge

d)

Conduction

11.

Like Charges

a)

attract

b)

repel

12.

Unlike charges

a)

attract

b)

repel

13.

What is the charge on the t-shirt?

a)

+7

b)

+3

c)

-4

d)

+11

14.

What is the charge on the balloon?

a)

-7

b)

-3

c)

+3

d)

-10

15.

What would happen if the t-shirt and the balloon were brought close together?

a)

They would attract

b)

They would repel

16.

Electricity happens with the flow of


(a)  
Choose from the below words
electrons
water
sand
power
17.

What's one example of a powerful electrical charge?

a)

lightening

b)

fire

c)

tornado

d)

flashlight

18.

Match the particle to their correct charge

a)

Positive

1.

Proton

b)

Negative

2.

Electron

c)

Neutral

3.

Neutron

19.

When you get shocked by touching a doorknob, that's an example of ___________________.

a)

current electricity

b)

static electricity

20.

Static electricity happens when

(a)  

Choose from the below words
electrons jump from one thing to another
protons jump from one thing to another
neutrons jump from one thing to another
21.

What would cause two balloons to repel?

a)

one is positive and one is negative

b)

both balloons are positive

c)

both balloons are negative

d)

one balloon is positive and one is neutral

22.

If the balloon has a negative charge, the hair must have a (a)   charge.

23.
Rubbing a balloon on hair is an example of static charge build up created by....
a)
conduction
b)
friction
c)
induction
d)
hairduction
24.
Lightning is _____.
a)
a buildup of neutrons
b)
harmless
c)
a high-voltage electric current
d)
a large discharge of static electricity
25.
The girl's hair and the comb are attracting  one another.  The hair and the comb have
a)
opposite charges
b)
like charges
26.

Two balloons are hanging from a stick.

One balloon has a positive charge and the other has a negative charge.

How would you expect the balloons to move?

a)

there would be no movement

b)

towards each other

c)

away from each other

27.
A material that allows electrons to pass easily
a)
insulator
b)
conductor
c)
electric field
d)
static discharge
28.
A material that does not allow electrons to move through it easily
a)
insulator
b)
conductor
c)
charging by contact
d)
electric field
29.

What is ELECTRICITY?

a)

The flow of the sun's energy.

b)

The flow of positive charges (protons)

c)

The flow of negative charges (electrons)

d)

The flow of energy from lightbulbs

30.

Which is an example of an insulator or resistor?

a)

paper clip

b)

blanket

c)

coin

d)

nail

31.

Solve for the total resistance of the circuit shown

a)

50 V

b)

1970 ohms

c)

705 K ohms

d)

20 Amps

32.

Solve for total Current in the circuit shown

a)

25 Amps

b)

35 amps

c)

25 milliamps

d)

35 milliamps

33.

Solve for the current flowing through Resistor # 1

a)

35 amps

b)

25 amps

c)

35 milliamps

d)

25 milliamps

34.

Solve for the voltage drop at resistor 1

a)

38 volts

b)

60 Kvolts

c)

50 volts

d)

25 volts

35.

Voltage drop stands for what?

a)

the voltage applied to a circuit

b)

the voltage flowing through a resistor

c)

the voltage used by a load

36.

With three 10 resistors connected in series with a 30 volt power supply, the total circuit current will equal ____.

a)

300 amps

b)

1 amp

c)

150 amps

d)

1 millamp

37.

The wattage value for any resistor is equal to ____.

a)

I X R

b)

E/R

c)

I X E

d)

I/R

38.

Total series circuit wattage is equal to source voltage ____.

a)

multiplied by the voltage value going through any resistor

b)

multiplied by the current value going through any resistor

c)

divided by the current value going through any resistor

d)

divided by the voltage applied to the circuit and the total resistance of the circuit

39.

Using the circuit shown solve for total power dissipated in this circuit.

a)

20 watts

b)

30 watts

c)

1.8 Kilowatts

d)

180 watts

40.

The wattage being dissipated at R3 is ______________________________ W.

a)

18

b)

54

c)

36

41.

The voltage drop across R1 is ______________________________ V.

a)

20

b)

30

c)

40

d)

50

42.

The wattage being dissipated at R2 is _______________ W.

a)

27

b)

12

c)

15

d)

36

43.

When a resistor in a series circuit is replaced by another resistor with an increased resistance value, the total circuit current will __________.

a)

stay the same

b)

decrease

c)

increase

d)

double in value

44.

This circuit has only one path for current to flow

a)

series

b)

parallel

c)

combination

d)

split

45.

The formula I2 * R is used to find what?

a)

Current

b)

Voltage

c)

Resistance

d)

Power

46.

The formula E2/R

a)

Voltage

b)

Current

c)

Power

d)

Resistance

47.

__________ remains the same in a series circuit.

a)

Resistance

b)

Voltage

c)

Current

d)

Power

48.

What is the total circuit resistance of the following five resistors connected in series?

R1 = 27 ohms

R2 = 33 ohms

R3 = 51 ohms

R4 = 1.2 kohms

R5 = 240 ohms

Rt = __________ Ohms

a)

353.2

b)

1551

c)

1.9 K

49.

What is the total circuit resistance of two 25 ohm resistors and three 75 ohm resistors connected in series?

a)

100 ohms

b)

200 ohms

c)

275 ohm

d)

175 ohms

50.

What happens to total current in a series circuit when the total voltage stays the same, circuit resistance decreases, current will ____________.

a)

increase

b)

Stay the same

c)

Decrease

51.

The following resistors are connected in

a)

Series

b)

Parallel

c)

Congruent

d)

none

52.

What must ALWAYS be equal for these two resistors?

a)

current

b)

resistance

c)

voltage

d)

amperes

53.

Find the total resistance in the circuit?

a)

9Ω

b)

3Ω

c)

18Ω

d)

2Ω

54.

What is the total current of the circuit, if RTR_T = 2Ω?

a)

3/2 A

b)

1A

c)

3A

d)

2A

55.

What is the current passing through the 6Ω resistor?

a)

1 A

b)

0.5A

c)

2A

d)

9A

56.

What is the current passing through the 3Ω resistor?

a)

1 A

b)

0.5A

c)

2A

d)

9A

57.

If R2>R3>R1. Which R have more voltage across it?

a)

R1

b)

R2

c)

R3

d)

all the same voltage

58.

If R2>R3>R1. Which R have more current through it?

a)

R1

b)

R2

c)

R3

d)

all the same current

59.

If A1 reads 5A, and A3 reads 3A, what should A2 read?

a)

2A

b)

3A

c)

5A

d)

1A

60.

Which ammeter measures the total current of the circuit?

a)

A1

b)

A2

c)

A3

d)

none

61.

Voltmeter devices should always be connected in...

a)

series

b)

parallel

c)

doesn't matter

d)

none

62.

Ammeter devices should always be connected in...

a)

series

b)

parallel

c)

doesn't matter

63.

If both resistors are 5Ω, are the values for the ammeter and voltmeter correct?

a)

yes

b)

no

64.

Electromagnetic Induction (pHet simulation) is...

a)

the use of the movement of magnets around a coil of wire to create an electrical current through the wire

b)

the use of the movement of electricity around a coil of wire to create an electrical current through the wire

65.
This is a picture of a simple electromagnet. How can the electromagnet be made stronger?
a)
Add more coils of wire to the nail.
b)
Use a smaller battery.
c)
Reverse the poles of the magnet.
d)
Remove all the coils and the nail.
66.
Surrounding every moving electron is 
a)
(a) a magnetic field
b)
(b) an electric field
c)
(c) both of these
d)
(d) none of these
67.

What conclusion can you draw from this graph?

a)

As current increases, magnetic strength decreases.

b)

As current increases, magnetic strength increases.

c)

As current decreases, magnetic strength increases.

d)

There is no relationship between current and magnetic strength.

68.
As electrons move, they make
a)
A. electromagnetism.
b)
B. auroras.
c)
C. ferromagnetism.
d)
D. magnetic fields.
69.
What is created when a magnet moves through a coil of wire?
a)
A. an electromagnet
b)
B. a ferromagnet
c)
C. a solenoid
d)
D. an electric current
70.
What is true about electricity and magnetic fields?
a)
Electricity is needed to create any magnet.
b)
Electricity always creates a magnetic field.
c)
Electricity is stronger than a magnetic field.
d)
Electricity prevents magnetic fields from occurring.
71.
Where is the force of attraction the strongest on a magnet?
a)
at the poles
b)
in the middle
c)
above the magnet
d)
below the magnet
72.
What happens when a wire is wound into a coil around an iron core in an electromagnet?
a)
the wire exolodes
b)
you get electrocuted 
c)
the magnetic field becomes stronger
d)
the magnetic field becomes weaker
73.
How do you make an electromagnet?
a)
wrap a battery in wire and connect it to an iron nail.
b)
wrap a wire with another wire and connect it to an iron nail.
c)
wrap an iron nail in wire and connect it to a power source.
d)
wrap an iron nail in wire and connect it to another iron nail.
74.
What would happen if I move a bar magnet in and out of a coil of copper wire?
a)
Electric current would disappear 
b)
The magnet would explode 
c)
Electric current will flow through the wire
d)
It would produce a gravitational field
75.
___ Law says that the Induced current is proportional to the change of magnetic flux 
a)
Lenz'
b)
Faraday's
c)
Ampere's
76.
How could the experimenter increase the amount of electricity being induced by this experiment?
a)
Increase the number of coils
b)
Decrease the number of coils
c)
Flip the magnet around
d)
Nothing, the amount of electricity cannot be increased
77.
Magnets can be used to create electricity? 
a)
True
b)
False
78.
The voltmeter is at 0 in this image. How would you manipulate the experiment to create electricity (measured in volts)?
a)
Flip the magnet around so the North pole is facing out
b)
Move the magnet back and forth
c)
Take the magnet out
d)
Add more coils around the paper cylinder
79.
What is one way to increase the current in a wire?
a)
Decrease the number of coils
b)
Increase the number of coils
c)
Move the magnet slower
d)
Take the wire off of the magnet
80.

Can you produce current in a wire with a magnet that is sitting still?

a)

Yes; having a magnet near a wire is enough to excite the electrons

b)

No; the magnetic field has to be changing to excite the electrons

c)

No; magnets cannot create electricity

81.

Which pairs of materials could be used to create electromagnetic induction?

a)

Coiled wire, a magnet

b)

Coiled wire, a battery

c)

A magnet, a battery

d)

None of the above

82.

Why is magnetic induction important?

a)

Electromagnets are very versatile

b)

Every electric motor uses induction

c)

Because it's an easy way to produce electricity

d)

All of the above

83.

What can electromagnets do that regular magnets can't?

a)

Switch their magnetic fields

b)

Explode

c)

Be turned off

d)

They are both the same in every way

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