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12_R:OhmsSchemMotors

Total questions: 78

Worksheet time: 3hrs 13mins

Name
Class
Date
1.
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
2.
What is current measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
3.
What is resistance measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
4.
Electricity that flows in a closed path is called a
a)
path
b)
current
c)
circuit
d)
light
5.
What is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?
a)
25 V
b)
10 V
c)
2.5 V
d)
0.4 V
6.
Current times Resistance equals
 (I X R)
a)
Power
b)
Voltage
c)
Amperage
d)
Ohm
7.

Voltage divided by Resistance

(V / R)

a)

Current

b)

Power

c)

Ohms

d)

Watts

8.

Voltage divided by Current

(V / I)

a)

Current

b)

Power

c)

Resistance

d)

Watts

9.

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

10.
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
11.
This circuit has a 24 volt battery and the resistor is 8 ohms. How many amps are running through the circuit?
a)
3 Amps
b)
192 Amps
c)
2 Amps
d)
4 Amps
12.
What word means how hard it is for electrons to flow through.
a)
Current
b)
Voltage
c)
Resistance
d)
Power
13.
The flow of electricity requires a
a)
complete path
b)
incomplete path
c)
insulated current
d)
complex circuit
14.
To complete a circuit the switch must be
a)
unattached
b)
open
c)
closed
d)
It depends
15.
Two types of circuits are
a)
parallel and magnetic
b)
electromagnetic and series
c)
series and parallel
16.
What type of circuit is pictured?
a)
series
b)
parallel
17.
What voltage is needed to cause a 2A current flow through a 10Ω resistor?
a)
5V
b)
0.2V
c)
20V
d)
200V
18.

What voltage is needed to cause a 50A current flow through a 10Ω resistor?

a)

15V

b)

500V

c)

500 kV

d)

0.2V

19.

material that electricity cannot flow through

a)

conductor

b)

insulator

c)

wire

d)

circuit

20.

electricity is the flow of

a)

protons

b)

neutrons

c)

quarks

d)

electrons

21.

A light circuit is operating at 75 Volts. What is the circuit's current if the resistance is 5 Ohms?

a)

375 Amps

b)

50 Amps

c)

15 Amps

d)

0.07 Amps

22.

If a charger for a tablet offers a voltage of 120V and has 240Ω of resistance, what is the amperage?

a)

0.5A

b)

2A

c)

14,400A

d)

28,800A

23.

An alarm clock draws 0.5 A of current when connected to a 120 volt circuit. Calculate its resistance.

a)

60Ω

b)

120Ω

c)

180Ω

d)

240Ω

24.

Why electrical wiring usually are covered with a layer of plastic?

a)

To make it look pretty

b)

To help electricity flow along the wire

c)

To make it safe

d)

To add more energy

25.
How do you calculate voltage?
a)
Current X Resistance
b)
Resistance ÷ Current
c)
Current ÷ Resistance
d)
Measure it with a ruler
26.
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
27.

Current is like ______________________.

a)

the water flowing from the spigot

b)

the hose being squeezed

c)

the water flowing from the hose

d)

the dog running through the yard

28.

If a computer has 10.0A of current and 11Ω of resistance, what is its voltage?

a)

0.9V

b)

1.1V

c)

55V

d)

110V

29.

A 10 ohms resistor is powered by a 5-V battery. The current flowing through the source is:

a)

10 A

b)

50 A

c)

2 A

d)

0.5 A

30.

If an electric ceramic brush has a current of 0.3 amps and a voltage of 120 volts, what is the resistance?

a)

18Ω

b)

36Ω

c)

200Ω

d)

400Ω

31.

Which will have a greater resistance: A 10 m long wire or a 5 m long wire?

a)

5 m long wire

b)

10 m long wire

c)

They will have the same resistance

d)

not enough information to solve

32.

What is the relationship between voltage and current?

a)

Directly proportional

b)

Inversely proportional

c)

No relationship

d)

Random relationship

33.

What will be the current when a 240 Ohm lamp is plugged into a 120 volt outlet in the US?

a)

0.5 Amps

b)

1 Amp

c)

2 Amps

d)

4 Amps

34.
What types of charges attract?
a)
Positive and Positive
b)
Positive and Neutral
c)
Negative and Neutral
d)
Positive and Negative
35.

In the model, what does the lightbulb represent?

a)

electricity

b)

current

c)

voltage

d)

resistance

36.

In the model, what does the battery represent?

a)

voltage

b)

current

c)

circuit

d)

resistance

37.

Which best describes a parallel circuit?

a)

Electricity flows along one pathway.

b)

The flow of electricity comes from one source.

c)

Electricity flows along more than one pathway.

d)

The flow of electricity comes from more than one source.

38.
DC stands for ____ and is used in batteries.
a)
Distant Current
b)
Don't Current
c)
Direct Current
d)
Distributed current
39.
What is this symbol?
a)
resistor
b)
switch
c)
battery
d)
bulb
40.

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

41.

If bulb #2 in this series circuit broke, bulb #1 would

a)

stay on

b)

go off

42.

Opposite Poles ___________________________.

a)

Repel each other.

b)

Attract each other.

43.

_________________ an instrument containing a magnetized pointer that shows the direction of magnetic north and bearings from it.

a)

electromagnets

b)

compass

c)

electro compass

d)

Magnetic Theory

44.

_____________________ a device used to convert electric energy into mechanical energy.

a)

Motor

b)

Direct Current

c)

Alternating Current

d)

Compass

45.

______________ magnets are created by passing a current through a wire.

a)

compass magnets

b)

electromagnets

c)

DC Motor Magnets

46.

The natural forces that are very closely related to one another is electricity and (a)   .

Choose from the below words
Ohms
Molecule
Magnetism
Atom
47.

The electricity in our house is (a)  

Choose from the below words
AC
DC
BC
AD
48.
Electric motors are devices that convert _____ energy into  _____ energy.
a)
electrical; mechanical
b)
mechanical; electrical
c)
chemical; potential
d)
mechanical; kinetic
49.

The greater the number of windings (the number of times it is wrapped around) in an electromagnet's coil

a)

the stronger the magnet is

b)

the less the magnet will pick up

c)

the more current it takes to create the electromagnet

d)

the slower the compass needle moves to the wire

50.
What is the device seen here?
a)
generator
b)
electric motor
c)
electromagnet
d)
magnet
51.
When plugged into an outlet, the clock lights up to show the time.  What kind of energy transformation is this?
a)
chemical to light
b)
mechanical to chemical
c)
electrical to mechanical
d)
electrical to light
52.
Generators are devices that convert _____ energy into _____ energy.
a)
chemical; mechanical
b)
mechanical; electrical
c)
electrical; mechanical
d)
potential; kinetic
53.
this is the symbol for a _____?
a)
switch
b)
light 
c)
battery
d)
wires
54.
This is the circuit symbol for ...
a)
an AC current source
b)
a DC current source
c)
an ammeter
d)
a voltmeter
55.
This is the circuit symbol for ...
a)
an AC current source
b)
a DC current source
c)
an ammeter
d)
a voltmeter
56.
This is the circuit symbol for ...
a)
an AC current source
b)
a DC current source
c)
a battery
d)
a single cell
57.
This is the symbol for 
a)
An Ammeter
b)
A Voltmeter
c)
A Meter
d)
A Motor
58.
This is the symbol for a _____?
a)
Lamp
b)
Water wheel
c)
Loudspeaker
d)
Motor
59.

What is the following symbol represent?

a)

Wire

b)

Resistor

c)

Battery

d)

Switch

60.

This symbol represents a ..........

a)

Bulb

b)

Resistor

c)

Wire

d)

L.E.D.

61.

What symbol is this?

a)

speaker

b)

lamp

c)

antenna

d)

diode

62.
This is the symbol for 
a)
Variable resistor
b)
Thermistor
c)
Resistor
d)
Fuse
63.

More than one cell connected together, stores energy in a chemical form

a)

bicell

b)

battery

c)

fuse

d)

capacitor

64.

Stores electricity and then discharges it back into the circuit when there is a drop in voltage

a)

bicell

b)

battery

c)

fuse

d)

capacitor

65.

an electrical safety device that prevents too much current from flowing

a)

battery

b)

capacitor

c)

fuse

d)

ground

66.

The reference point in an electrical circuit from which voltages are measured, in a one battery circuit, the negative terminal is also called this

a)

battery

b)

capacitor

c)

fuse

d)

ground

67.

This converts electrical energy into light and heat, commonly used to check visually if a circuit is complete

a)

battery

b)

lamp or bulb

c)

ground

d)

motor

68.

What is an electromechanical transducer that allows the amount of opposition of the flow to change?

a)

motor

b)

Bulb or lamp

c)

variable resistor

d)

capacitor

69.

What opposes the flow of current, color bands are used to label the amount of resistance provided?

a)

motor

b)

reflector

c)

resistor

d)

dissentor

70.

What component with at least 3 terminals, can be used as an amplifier or switch?

a)

transformer

b)

transistor

c)

transitioner

d)

Togruta

71.

How many mA are in one Amp?

a)
500 mA
b)

1/1000 mA

c)
1000 mA
d)

100 mA

72.

How many Amps are in one mA?

a)

500 A

b)

1/1000 A

c)

1000 A

d)

100 A

73.

If the current through a circuit is 2 A and the resistance of a light bulb in the circuit is 10 Ohms, what is the voltage across the light bulb?

a)

5 V

b)

12 V

c)

20 V

74.

If you increase the voltage across a resistor, what will happen to the current?

a)

Current will increase

b)

Current will decrease

c)

Current will stay the same

75.

The slope of voltage (V) versus current (I) is called...

a)

resistance

b)

induction

c)

resistivity

d)

conductivity

76.

This circuit has a 7.8 volt battery and the resistor is 6 ohms. How many amps are running through the circuit?

a)

1.3 Amps

b)

.8 Amps

c)
2 Amps
d)
4 Amps
77.
If the Voltage is increased and the resistance stays the same, Current will
a)
Increase
b)
Decrease
c)
Stay the same
d)
X
78.

An example of a parallel circuit is

a)

the wiring in a house

b)

a flashlight

c)

a single circular path

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