Free Printable Unit Test - Electricity and Circuits

1.

Identify this tool

a)

Digital multimeter

b)

Digital therometer

c)

Digital pedometer

d)

Digital weight scale

2.

What is a multimeter?

a)

a tool used to estimate distance current travels

b)

a tool used to find a correct locaton

c)

a tool used to measure electricity

d)

a tool used to measure electronics

3.

The measurement mode in the illustration in figure is :

a)

Resistance in Ohms

b)

Voltage

c)

Current in Amperes

d)

Continuity in Ohms

4.

The measurement mode in the illustration in figure is :

a)

Resistance in Ohms

b)

Voltage

c)

Current in Amperes

d)

Continuity in Ohms

5.

The measurement mode in the illustration in figure is :

a)

Resistance in Ohms

b)

Voltage

c)

Current in Amperes

d)

Continuity in Ohms

6.

On a multimeter which wire is used for what?

a)

the red probe is used for positive, and the black probe is used for negative

b)

the red probe is used for negative, and the black probe is used for positive

7.

What does the following symbol represents?

a)

Battery

b)

Resistor

c)

Bulb

d)

Ammeter

8.

What do you call that symbol?

a)

resistance

b)

current

c)

microfarad

d)

ohm

9.

The unit of measuring Resistance is:

a)

Henry (H)

b)

Ampere (A)

c)

Ohm (Ω)

d)

Volt (V)

10.

What physical quantity does the voltmeter measures.

a)

Current

b)

Power

c)

Voltage

d)

Resistance

11.

What physical quantity does ammeter measures?

a)

Voltage

b)

Current

c)

Resistance

d)

Power

12.

An electrical kettle is rated 500W. What physical quantity does 500W represent?

a)

Power

b)

Current

c)

Resistance

d)

Voltage

13.

Choose the true statement below concerning DC currents:

a)

DC stands for Direct Computing and electrons flow in multiple pathways

b)

DC stands for direct current and electrons flow in multiple directions

c)

DC stands for direct current and the electrons do not flow

d)

DC stands for direct current and the electrons flow in only one direction

14.

In electrical terms, what does AC mean?

a)

Amplified Current

b)

Amplitude Current

c)

Attenuating Current

d)

Alternating Current

15.

Which of the following is the symbol for AC voltage?

a)

---

b)

u

c)

.)))

d)

~

16.

When electricity moves in only one direction (usually a current from batteries).

a)

Alternating current

b)

Direct current

c)

Ionic current

d)

Both Alternating and Direct

17.

Which type of electric current are you using when you turn on your TV at home?

a)

AC

b)

DC

c)

Resistance

d)

Conductive

18.

The tendency for a material to oppose the flow of electrons, changing electrical energy into thermal energy and light.

a)

Voltage

b)

Current

c)

Resistance

d)

Circuit

19.

These refer to the handles used to hold tip on the tested connection

a)

Probes

b)

Red Meter Lead

c)

Tips

d)

Black Meter Lead

20.

How is a parallel circuit different from a series?

a)

It has multiple paths for the current to follow and the voltage stays the same in all lights

b)

It has many branches that get weaker farther from the battery

c)

They are two circuits running side by side

d)

They are the same thing

21.

Which of the following circuit is a parallel circuit?

a)

b)

c)

d)

22.

For a 4-band resistor, which band indicates tolerance?

a)

1

b)

2

c)

3

d)

4

23.

For a 4-band resistor, which band indicates the multiplier?

a)

1

b)

2

c)

3

d)

4

24.

For a 4-band resistor, which band describes the first digit of the resistor value?

a)

1

b)

2

c)

3

d)

4

25.

For a 4-band resistor, which band describes the second digit of the resistor value?

a)

1

b)

2

c)

3

d)

4

26.

What are the first three bands of a

47\ k\Omega

resistor?

a)

yellow, violet, brown

b)

yellow, blue, orange

c)

orange, violet, yellow

d)

yellow, violet, orange

27.

What are the first three bands of a

100\ \Omega

resistor?

a)

brown, brown, brown

b)

brown, black, black

c)

brown, black, brown

d)

black, black, brown

28.

What are the first three bands of a

$2.7\ k\Omega$ resistor?

a)

red, yellow, red

b)

red, violet, red

c)

red, violet, orange

d)

orange, blue, brown

29.

What is the maximum possible "within tolerance" value of a

120\ \Omega\ \pm\ 2\%

resistor?

a)

$122.4\ \Omega$

b)

$124\ \Omega$

c)

$122\ \Omega$

d)

$117.6\ \Omega$

30.

What is the maximum possible "within tolerance" value of a

680\ k\Omega\ \pm\ 1\%

resistor?

a)

$673.2\ k\Omega$

b)

$681\ k\Omega$

c)

$686.8\ k\Omega$

d)

$693.6\ k\Omega$

31.

What color in the color-coding scheme has an equivalent of 5 in the 2nd band?

a)

A. Brown

b)

B. Green

c)

C. Red

d)

D. Yellow

32.

What is the color of the tolerance representing ±10%?

a)

A. Gold

b)

B. Black

c)

C. Orange

d)

D. Silver

33.

What is the value of a resistor with the following colors: Green -Black-Brown-Gold?

a)

A.5000 Ohms ±5%

b)

B.50 Ohms ±5%

c)

C.500 Ohms ±5%

d)

D. 0.5 Ohm ±5%

34.

What is the value of a resistor with the following colors: Green -Black-Orange -Gold?

a)

A. 500 Ohms ±5%

b)

B. 5000 Ohms ±5%

c)

C. 50000 ohms ±5%

d)

D. 500000 Ohms ±5%

35.

What is the color of the tolerance representing ±5%?

a)

A. Gold

b)

B. Black

c)

C. Orange

d)

D. Silver

36.

What is the minimum resistance of a 100-ohm resistor with 10%tolerance?

a)

A. 90ohms

b)

B. 190ohms

c)

C. 190k ohms

d)

D. 210ohms

37.

An electrical component that we use in electronics circuits to limit current though an active component or to reduce voltage in the circuit.

a)

Capacitor

b)

Current

c)

Resistor

d)

Ancestor

38.

The maximum value of brown, red, red, gold resistor is:

a)

12600 ohms

b)

1260 ohms

c)

1940 ohms

d)

1400 ohms

39.

The maximum value of orange, blue, brown , gold resistor is:

a)

3780 ohms

b)

3420 ohms

c)

378 ohms

d)

342 ohms

40.

The maximum value of orange, orange, brown, gold resistor is

a)

3465 ohms

b)

3135 ohms

c)

313.5 ohms

d)

346.5 ohms

41.

The maximum value of brown, black, red, gold resistor is:

a)

1050 ohms

b)

15000 ohms

c)

5000 ohms

d)

500 ohms

42.

The maximum value of red, red, black, gold resistor is

a)

23.1 ohms

b)

231 ohms

c)

20.9 ohms

d)

209 ohms

43.

The minimum value of orange, blue, brown , gold resistor is:

a)

4700 ohms

b)

362 ohms

c)

378 ohms

d)

342 ohms

44.

What is the voltage of a circuit with 4 ohms of resistance and 3 amps of current?

a)

12 V

b)

21 V

c)

4/3 V

d)

3/4 V

45.

What is the current in a circuit with 6 ohms of resistance and a battery containing 24 Volts?

a)

1/4 A

b)

144 A

c)

4 A

d)

0.4 A

46.

What is voltage?

a)

the amount of push the electrical source supplies to the circuit

b)

how much a given device resists the flow of electric current

c)

flow of electric charge

d)

none of the above

47.

What is current?

a)

the amount of push the electrical source supplies to the circuit

b)

how much a given device resists the flow of electric current

c)

flow of electric charge

d)

none of the above

48.

What is resistance?

a)

the amount of push the electrical source supplies to the circuit

b)

how much a given device resists the flow of electric current

c)

flow of electric charge

d)

none of the above

49.

The following type of circuit has the same voltage throughout the entire circuit.

a)

series

b)

parallel

50.

The current is the same throughout this type of circuit

a)

series

b)

parallel

51.

What is the current of a series circuit with values of 5, 9, 17 ohms, with a battery of 12V

a)

0.3871

b)

3870.0

c)

372.0

d)

4.4395

52.

A parallel circuit has 6 ohm, 10 ohm, 12 ohm and 15 ohm resistors and a voltage of 10V, what is the current?

answer given in nearest whole number

a)

1.0

b)

2.0

c)

3.0

d)

4.0

53.

The current going through the 90 ohm resistor is

a)

10 amps

b)

0.1 amps

c)

0.2 amps

d)

.06 amps

54.

Find the voltage across R₁

a)

12 V

b)

4V

c)

3V

d)

2K

55.

Three resistors, $R_A=10\ \Omega$ , $R_B\ =20\ \Omega$ , and $R_C\ =\ 25\ \Omega$ , are connected in SERIES. The total resistance of this setup is equal to _____.

a)

$0.19\ \Omega$

b)

$5.26\ \Omega$

c)

$18.33\ \Omega$

d)

$55\ \Omega$

56.

Three resistors, $R_A=10\ \Omega$ , $R_B\ =20\ \Omega$ , and $R_C\ =\ 25\ \Omega$ , are connected in PARALLEL. The total resistance of this setup is equal to _____.

a)

$0.19\ \Omega$

b)

$5.26\ \Omega$

c)

$18.33\ \Omega$

d)

$55\ \Omega$

57.

Two resistors, $R_1$ and $R_2\$ are connected in SERIES. If $R_2\ >\ R_1$ , which among the statements is TRUE about the electric currents that passes thru each resistor?

a)

$I_1\ >\ I_2$

b)

$I_1=I_2$

c)

$I_1<I_2$

58.

Two resistors, $R_1$ and $R_2\$ are connected in PARALLEL. If $R_2\ >\ R_1$ , which among the statements is TRUE about the voltage that is used up by each resistor?

a)

$V_1\ >\ V_2$

b)

$V_1=V_2$

c)

$V_1<V_2$

59.

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

60.

What is the total resistance across this circuit?

a)

3 kΩ

b)

10 kΩ

c)

13 kΩ

d)

18 kΩ

61.

The picture shows two circuits each with two light bulbs. Which one will still function if one light bulb goes out?

a)

A-Series

b)

B-Parallel

c)

A-Parallel

d)

B-Seriese

62.

If a 15 ohm resistor is connected in parallel with a 30 ohm resistor, what is the equivalent resistance?

a)

2.0 ohms

b)

10. ohms

c)

15 ohms

d)

25 ohms

63.

The equivalent resistance in this part of the circuit is equal to

a)

19 Ohms

b)

0.67 Ohms

c)

1.5 Ohms

d)

6.3 Ohms

64.

A 30-ohm resistor and a 60-ohm resistor are connected in an electric circuit as shown. Compared to the electric current through the 30-ohm resistor, the electric current through the 60-ohm resistor is

a)

smaller

b)

larger

c)

the same

65.

In this circuit, what is the current through the

2-ohm resistor?

a)

0.2 A

b)

0.8 A

c)

5.0 A

d)

8.0 A

66.

The diagram shows three resistors, R1, R2, and R3, connected to a 12-volt battery. If voltmeter V1 reads 3 volts and voltmeter V2 reads 4 volts, what is the potential drop across resistor R3?

a)

0 V

b)

4 V

c)

5 V

d)

12 V

67.

A 30-ohm resistor and a 60-ohm resistor are connected in an electric circuit as shown. What is the total resistance of this circuit?

a)

0.05 Ohms

b)

20 Ohms

c)

45 Ohms

d)

90 Ohms

68.

Three resistors are connected in parallel. Which of the following expresses the total voltage across the three resistors?

a)

$V_{Tot}=V_1=V_2=V_3$

b)

$V_{tot\ }=\ V_1+V_2+V_3$

c)

$V_{tot\ }=V_1^{-1}+V_2^{-1}+V_3^{-1}$

d)

$V_{tot\ }^{-1}=V_1^{-1}+V_2^{-1}+V_3^{-1}$

69.

Three resistors are connected in series. Which of the following expresses the total current in the system compared to the individual currents in the resistors.

a)

$I_{Tot}=I_1=I_2=I_3$

b)

$I_{tot\ }=\ I_1+I_2+I_3$

c)

$I_{tot\ }=I_1^{-1}+I_2^{-1}+I_3^{-1}$

d)

$I_{tot\ }^{-1}=I_1^{-1}+I_2^{-1}+I_3^{-1}$

70.

Which resistor will get the MOST current flowing through it?

a)

2 Ohm Resistor

b)

4 Ohm Resistor

c)

6 Ohm Resistor

d)

10 Ohm Resistor

71.

In a ________ circuit there are multiple paths for the current to take.

a)

Series

b)

Parallel

72.

In a _________ circuit, if one bulb goes out then the entire circuit doesn't work.

a)

Series

b)

Parallel

73.

If the battery produced 12.6 Volts and what would be the current flow be for a 6 Ohm resistor

a)

2.1 Amps

b)

2.4 Amps

c)

1.71 Amps

d)

15 Amps

74.

What voltage is needed to cause a 2A current flow through a 10Ω resistor?

a)

5V

b)

0.2V

c)

20V

d)

200V

75.

What resistance is needed to cause a 20A current flow because of a 100V battery?

a)

0.2Ώ

b)

2000Ώ

c)

120Ώ

d)

5Ώ

76.

Which statement best explains why the lamp does not glow?

a)

Circuit 1 is an open circuit.

b)

Circuit 1 is a closed circuit.

c)

The negative terminal of Circuit 1 is connected to the cell.

d)

The positive terminal of Circuit 1 is connected to the cell.

77.

If the light bulb in the middle burned out, what would happen to the other two?

a)

The light bulb to the left would stay lit, but the one to the right would turn off.

b)

They would both stay lit.

c)

The light bulb to the right would stay lit, but the one to the left would turn off.

d)

They would both turn off.

78.

Identify the conductor below.

a)

cloth rag

b)

plastic bottle

c)

gold ring

79.

Identify the insulator below.

a)

aluminum foil

b)

paperclip

c)

rubber eraser

80.

Which formulas represents Ohm's law?

a)

V=IR

b)

R=IV

c)

I=RV

81.

Which subatomic particles have a positive charge?

a)

neutrons

b)

electrons

c)

protons

82.

How many volts are in a circuit with a battery that has a resistance of 10 Ohms and a current of 2 Amps?

a)

.5 Volts

b)

5 Volts

c)

20 Volts

83.

Electricity is the flow of _________.

a)

protons

b)

neutrons

c)

electrons

84.

Which type of current comes from a battery?

a)

alternating current (AC)

b)

direct current (DC)

85.

Electricity that flows in a closed path is called a

a)

path

b)

current

c)

circuit

86.

____________ stops the flow of electricity.

a)

A conductor

b)

An insulator

c)

A magnet

87.

In a ________ circuit there are multiple paths for the current to take.

a)

Series

b)

Parallel

88.

If the battery produced 12.6 Volts and what would be the current flow be for a 6 Ohm resistor

a)

2.1 Amps

b)

2.4 Amps

c)

1.71 Amps

d)

15 Amps

89.

What voltage is needed to cause a 2A current flow through a 10Ω resistor?

a)

5V

b)

0.2V

c)

20V

d)

200V

90.

What resistance is needed to cause a 20A current flow because of a 100V battery?

a)

0.2Ώ

b)

2000Ώ

c)

120Ώ

d)

5Ώ

91.

What is the power of a 20V bulb with 5A through it?

a)

100W

b)

100V

c)

6.3W

d)

6.3A

92.

What is the current through a 11V bulb with a power of 99W?

a)

9W

b)

9A

c)

60V

d)

60A

93.

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

a)

15V

b)

500V

c)

500 kV

d)

0.2V

94.

If the battery produced 12.6 Volts and what would be the current flow be for a 6 Ohm resistor

a)

2.1 Amps

b)

2.4 Amps

c)

1.71 Amps

d)

15 Amps

95.

What would the circuit resistance be if a 7.5 Amp draw was present with the engine running and the charging system producing 15 Volts

a)

15 Ohms

b)

4 Ohms

c)

0.3333 Ohms

d)

2 Ohms

Unit Test - Electricity and Circuits

Total questions: 95

Worksheet time: 2hrs 56mins

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