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Electricity Practice

Total questions: 67

Worksheet time: 1hrs 6mins

Name
Class
Date
1.

In a series circuit, if the total resistance is 10 ohms and the current flowing through the circuit is 2 amperes, what is the total power consumed by the circuit?

a)

20 watts

b)

40 watts

c)

10 watts

d)

5 watts

2.

What is the total voltage across a series circuit with three resistors of 2 ohms, 3 ohms, and 5 ohms, if the current flowing through the circuit is 1 ampere?

a)

10 volts

b)

5 volts

c)

15 volts

d)

20 volts

3.

In a parallel circuit, if the voltage across each branch is 12 volts, what is the power consumed by a branch with a resistance of 6 ohms?

a)

24 watts

b)

12 watts

c)

6 watts

d)

2 watts

4.

If a parallel circuit has a total current of 6 amperes and consists of three branches with equal resistance, what is the current through each branch?

a)

2 amperes

b)

3 amperes

c)

1 ampere

d)

6 amperes

5.

In a combination circuit, if the total power consumed is 60 watts and the total voltage is 12 volts, what is the total current flowing through the circuit?

a)

5 amperes

b)

10 amperes

c)

15 amperes

d)

20 amperes

6.

What is the equivalent resistance of a series circuit with resistors of 4 ohms, 6 ohms, and 10 ohms?

a)

20 ohms

b)

10 ohms

c)

4 ohms

d)

6 ohms

7.

In a parallel circuit, if one branch has a resistance of 8 ohms and another branch has a resistance of 4 ohms, what is the total resistance of the circuit?

a)

2.67 ohms

b)

12 ohms

c)

3 ohms

d)

6 ohms

8.

A combination circuit has a series section with a resistance of 5 ohms and a parallel section with resistances of 10 ohms and 20 ohms. What is the total resistance of the circuit?

a)

10 ohms

b)

11.67 ohms

c)

7.5 ohms

d)

35 ohms

9.

If the total power consumed by a parallel circuit is 100 watts and the voltage across the circuit is 10 volts, what is the total current flowing through the circuit?

a)

5 amperes

b)

10 amperes

c)

15 amperes

d)

20 amperes

10.

In a series circuit, if the voltage across the circuit is 24 volts and the total resistance is 12 ohms, what is the current flowing through the circuit?

a)

1 ampere

b)

2 amperes

c)

3 amperes

d)

4 amperes

11.

What is the power consumed by a resistor of 5 ohms in a series circuit with a current of 3 amperes?

a)

15 watts

b)

45 watts

c)

30 watts

d)

60 watts

12.

In a parallel circuit, if the total resistance is 2 ohms and the total current is 10 amperes, what is the total voltage across the circuit?

a)

5 volts

b)

10 volts

c)

20 volts

d)

15 volts

13.

A combination circuit has a total voltage of 18 volts and a total current of 3 amperes. What is the total power consumed by the circuit?

a)

54 watts

b)

36 watts

c)

18 watts

d)

9 watts

14.

What are the common units for measuring electrical power?

a)

Watt and horsepower

b)

Ampere, volt, ohm

c)

Newton, meter, second

d)

Coulomb and farad

15.

In a shop with an electrical circuit limited to 20 amps, which machines can be used simultaneously?

Band saw (1 hp, 110 V motor) 6.8 amps

CNC laser (200 W, 120 V) ​ (a)  

Laser engraver (3500 W, 220 V) ​ (b)  

Light (each) (400 W, 120 V) ​ (c)  

Computer (250 W, 120 V) ​ (d)  

3D printer (1600 W, 220 V) ​ (e)  

Choose from the below words
1.7 amps
15.9 amps
3.3 amps
2.1 amps
7.3 amps
16.
What is the power of a 20V bulb with 5A through it?
a)
100W
b)
100V
c)
6.3W
d)
6.3A
17.

The two ends of a 3.0-ohm resistor are connected to a 9.0-V battery. What is the total power delivered by the battery to the circuit?

a)

3.0 W

b)

27 W

c)

0.33 W

d)

0.11 W

18.
What is the power of a 3V light bulb with 20 A running through it?
a)
0.15W
b)
6W
c)
60W
d)
6.67W
19.

If the resistance in a constant voltage circuit is doubled, the power dissipated by that circuit will

a)

increase by a factor of two.

b)

increase by a factor of four.

c)

decrease to one-half its original value.

d)

decrease to one-fourth its original value.

20.

Which one of the following quantities is equivalent to 1 W?

a)

1 V/A

b)

1 Ω • m

c)

1 V • A

d)

1 V/Ω

21.

What is the equivalent resistance of three 10,000 Ω resistors in parallel?

a)

33,333 Ω

b)

3.1*10^7 Ω

c)

3.33333*10^14 Ω

d)

3,333.3 Ω

22.

Which of the following represents Ohm’s law?

a)

R = V x I

b)

V = I x R

c)

V = I / R

23.
In a parallel circuit if one of the light bulbs burns out the rest _________.
a)
stop the flow of electricity
b)
 can still light up
c)
 will go out
d)
of the light bulbs burn out also
24.

What is the equivalent resistance of two 10 ohm resistors in parallel?

a)

15 ohms

b)

10 ohms

c)

5 ohms

d)

20 ohms

25.

Solve for the current that is flowing through resistor three

a)

2 A

b)

154 mA

c)

154 A

d)

77 mA

26.

Solve for the voltage drop at resistor one

a)

10 V

b)

8 V

c)

3.08 V

d)

3.85 V

27.

Solve for the current that is flowing through Resistor one

a)

2 A

b)

154 mA

c)

154 A

d)

77 mA

28.

Solve for total current that is flowing through the circuit shown

a)

2 A

b)

154 mA

c)

154 A

d)

77 mA

29.

Solve for total circuit resistance

a)

140 Ohms

b)

75 Ohms

c)

90 Ohms

d)

65 ohms

30.

What is the voltage drop over the 2 ohm resistor?

a)

6 V

b)

3 V

c)

2 V

d)

1 V

31.

What is the voltage drop over the 4 ohm resistor?

a)

6 V

b)

3 V

c)

2 V

d)

1 V

32.

What is the current through the 4 ohm resistor?

a)

1.5 A

b)

3 A

c)

2 A

d)

0.75 A

33.

What is the current through the 2 ohm resistor?

a)

0.75 A

b)

1.5 A

c)

3 A

d)

0.33 A

34.

What is the total current through the battery?

a)

0.75 A

b)

1.5 A

c)

3 A

d)

0.33 A

35.

What is the total resistance in the circuit?

a)

10 ohms

b)

6 ohms

c)

4 ohms

d)

2.4 ohms

36.
a)
push switch
b)
diode
c)
circuit breaker
d)
fuse
37.

What does the electronic schematic symbol shown represent?

a)

Wire

b)

Resistor

c)

Battery

d)

Switch

38.

What does the electronic schematic symbol shown represent?

a)

an AC current source

b)

a DC current source

c)

an ammeter

d)

a voltmeter

39.

What does the electronic schematic symbol shown represent?

a)

an AC current source

b)

a DC current source

c)

an ammeter

d)

a voltmeter

40.

What does the electronic schematic symbol shown represent?

a)

Wire

b)

Battery

c)

Buzzer

d)

Fuse

41.

What does the electronic schematic symbol shown represent?

a)

light bulb

b)

cell

c)

battery

d)

resistor

42.

What does the electronic schematic symbol shown represent?

a)

switch

b)

light

c)

battery

d)

wires

43.

Fill in the Table.

Symbols are in ( ).

a)

A

b)

(C)

c)

(I)

d)

(A)

e)

(V)

f)

(Ω)

g)

R

h)

I

i)

C

j)

V

1
2
3
4
5
6
1)
2)
3)
4)
5)
6)
44.

Which is not an equation to find power?

a)

R x I2R\ x\ I^2

b)

I x VI\ x\ V

c)

V2R\frac{V^2}{R}

d)

I x RI\ x\ R

45.

What is power measured in?

a)
watts
b)
ohms
c)
volts
d)
joules
46.

In a simple circuit such as a light bulb with a voltage applied to it, the resistance determines the current by_______________

a)
ignoring the voltage
b)
increasing the resistance
c)
applying Ohm's Law
d)
decreasing the current
47.

In a combination circuit, if the total power consumed is 60 watts and the total voltage is 12 volts, what is the total current flowing through the circuit?

a)

5 amperes

b)

10 amperes

c)

15 amperes

d)

20 amperes

48.

In a parallel circuit, if the voltage across each branch is 12 volts, what is the power consumed by a branch with a resistance of 6 ohms?

a)

24 watts

b)

12 watts

c)

6 watts

d)

2 watts

49.

If a resistor has the color bands: red, red, brown, gold, what is its resistance value?

a)

220 ohms with a tolerance of ±5%

b)

220 ohms with a tolerance of ±10%

c)

200 ohms with a tolerance of ±5%

d)

240 ohms with a tolerance of ±5%

50.

A resistor has the color bands: yellow, violet, orange, silver. What is its resistance value?

a)

39 kOhms

b)

74 kOhms

c)

50 kOhms

d)

47 kOhms

51.

What is the minimum value in the tolerance range of a resistor with color code Brown-Red-Brown?

a)

108 Ω

b)

144 Ω

c)

116 Ω

d)

96 Ω

52.

What is the multiplier for color Green?

a)

x10,000

b)

x1,000,000

c)

x100,000

d)

x1,000

53.

The purpose of the color bands on a resistor is to:

a)

Indicate the resistance value

b)

Show the manufacturing date

c)

Display the brand name

d)

Provide the temperature rating

54.

Determine the nominal value for the resistor shown using the color code chart provided.

a)

100 ohms

b)

220 ohms

c)

1600 ohms

d)

470 ohms

55.

Determine the nominal value for the resistor shown using the color bands: Orange, White, Green, and Gold.

a)

390 ohms

b)

3900 ohms

c)

3900000 ohms

d)

390000 ohms

56.

What is the value of a resistor with the colour code: Red, Orange, Green?

a)

234 ohms

b)

20004 ohms

c)

230000 ohms

57.

What is the color code for a resistor with a value of 10^9?

a)

White

b)

Gray

c)

Violet

d)

Blue

58.

What does the first digit in the resistor color code represent?

a)

Multiplier

b)

Tolerance

c)

First digit of the value

d)

Second digit of the value

59.

What is the tolerance of a resistor with no color band?

a)

5%

b)

10%

c)

20%

d)

15%

60.

A resistor's first three colour bands are brown, black, and red. What is its value?

a)

10 ohms

b)

10 Kohms

c)

200 ohms

d)

1000 ohms

61.

Which digit does the color yellow denote on a resistor color band?

a)

3

b)

2

c)

4

d)

7

62.

A 47 Kohm resistor would have which colours on its first three bands?

a)

yellow, violet, white

b)

red, white, blue

c)

yellow, violet, orange

d)

orange, yellow, violet

63.

Which colour represents the digit 6 in the resistor colour code?

a)

blue

b)

pink

c)

red

d)

green

64.

What does a multimeter typically measure?

a)

Voltage, current, and resistance

b)

Only voltage

c)

Only current

d)

Only resistance

65.

What common measurements taken with a multimeter should be taken while power is applied to a circuit? (Select all that apply)

a)

Voltage

b)

Current

c)

Resistance

d)

Charge

e)

Energy

66.

What common measurements taken with a multimeter should be taken while power is NOT applied to a circuit? (Select all that apply)

a)

Voltage

b)

Current

c)

Resistance

d)

Charge

e)

Energy

67.

Which is not an equation to find power?

a)

R x I2R\ x\ I^2

b)

I x VI\ x\ V

c)

V2R\frac{V^2}{R}

d)

I x RI\ x\ R

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