WorksheetsCircuits
Total questions: 50
Worksheet time: 1hrs 14mins
Name
Class
Date
1.
An electric circuit is a closed loop or pathway that allows electric charges to flow.
a)
True
b)
False
2.
A resistor is a device that converts chemical energy into electrical energy.
a)
True
b)
False
3.
A parallel connection is a type of electrical circuit in which there is a single current pathway.
a)
True
b)
False
4.
A series connection is a type of electric circuit in which there are multiple paths.
a)
True
b)
False
5.
A resistor is a device that controls current in electric circuits.
a)
True
b)
False
6.
An electric current is a flow of charged particles.
a)
True
b)
False
7.
Three resistors with values of 4.0 Ω, 6.0 Ω and 8.0 Ω respectively, are connected in series. What is their equivalent resistance?
a)
18
b)
8.0
c)
6.0
d)
1.8
8.
If a 325 W heater has a current of 6.0 A, what is the resistance of the heating element?
a)
88 Ω
b)
54 Ω
c)
9.0 Ω
d)
11 Ω
9.
If a 75 W light bulb operates at a voltage of 120 V, what is the current in the bulb?
a)
0.63 A
b)
1.6 A
c)
9.0 x 103 A
d)
1.1 x 10-4 A
10.
Three resistors with values of R1, R2 and R3 are connected in series.
Which of the following expresses the total resistance, R1, of the three resistors?
Which of the following expresses the total resistance, R1, of the three resistors?
a)
Rt = R1 + R2 + R3
b)
Rt = 1/R1 + 1/R2 + 1/R3
c)
Rt = R1 = R2 = R3
d)
Rt = (1/R1 + 1/R2 + 1/R3
11.
Three resistors with values of 4.0 Ω, 6.0 Ω and 10.0 Ω are connected in parallel. What is their equivalent resistance?
a)
20.0 Ω
b)
7.3 Ω
c)
6.0 Ω
d)
1.9 Ω
12.
The current flowing in an electric circuit can be increased by:
a)
increasing voltage or decreasing resistance.
b)
decreasing voltage or increasing resistance.
c)
increasing voltage and increasing resistance.
d)
decreasing voltage and decreasing resistance.
13.
Compared to thin wires, electrical resistance in thick wires is:
a)
greater
b)
less
c)
the same
14.
When one bulb in a series circuit containing several light bulbs burn out:
a)
the other bulbs burn brighter.
b)
nothing changes in the rest of the circuit.
c)
none of the other bulbs will light up.
15.
When resistors are put in parallel with each other their overall resistance is:
a)
larger than that of any other resistor.
b)
the same as the resistance of one of the resistors.
c)
smaller than the resistance of any of the resistors.
16.
According to Ohm's Law, if the current is increased, what happens to the voltage across the resistor?
a)
It increases.
b)
It decreases.
c)
It remains the same.
17.
A car dashboard panel bulb has a resistance of 33 Ω when it is placed across a 12 V battery. What is the current through the circuit?
a)
0.36 A
b)
2.8 A
c)
3.96 A
d)
396 A
18.
A lamp uses 15 W of power when it is connected across 25 V. What is the current through the lamp?
a)
0/60 A
b)
1.67 A
c)
9390 A
d)
93800 A
19.
A light bulb uses 100W of power when connected across 120V. What is the current drawn by the light bulb?
a)
0.8 A
b)
1.0 A
c)
12.0 A
d)
2.0A
20.
A lamp draws a current of 0.50 A when it is connected to a 120 V source. What is the resistance of the lamp?
a)
4.17 x 10-2 Ω
b)
60 Ω
c)
2.4 x 102 Ω
d)
24 x 102 Ω
21.
In a simple circuit, a voltage of 5.0 V is applied across a resistance of 10.0 Ω. What is the power dissipated in the resistor?
a)
0.50 W
b)
5.0 W
c)
2.5 W
d)
50 W
22.
If a branch with a resistor is added to a parallel circuit, the equivalent resistance:
a)
increases.
b)
decreases.
c)
remains the same.
d)
becomes zero.
23.
If a resistor is added to a series circuit, the equivalent resistance:
a)
increases.
b)
decreases.
c)
remains the same.
d)
becomes zero.
24.
Resistance is measured in:
a)
joules
b)
ohms
c)
amperes
d)
watts
25.
Current is measured in:
a)
joules
b)
ohms
c)
amperes
d)
watts
26.
Power is measured in:
a)
joules
b)
ohms
c)
amperes
d)
watts
27.
Identify the following as characteristics of either a series circuit or a parallel circuit:
When one light bulb burns out, the rest stay lit.
When one light bulb burns out, the rest stay lit.
a)
Series circuit
b)
Parallel circuit
28.
Identify the following as characteristics of either a series circuit or a parallel circuit:
When one light bulb burns out, they all go out.
When one light bulb burns out, they all go out.
a)
Series circuit
b)
Parallel circuit
29.
Identify the following as characteristics of either a series circuit or a parallel circuit:
Type of circuit used to wire buildings.
Type of circuit used to wire buildings.
a)
Series circuit
b)
Parallel circuit
30.
Identify the following as characteristics of either a series circuit or a parallel circuit:
Consists of units wired in separate branches.
Consists of units wired in separate branches.
a)
Series circuit
b)
Parallel circuit
31.
Identify the following as characteristics of either a series circuit or a parallel circuit:
Current remains the same throughout the entire circuit.
Current remains the same throughout the entire circuit.
a)
Series circuit
b)
Parallel circuit
32.
Identify the following as characteristics of either a series circuit or a parallel circuit:
Voltage throughout the circuit remains the same.
Voltage throughout the circuit remains the same.
a)
Series circuit
b)
Parallel circuit
33.
Two resistors of 5 Ω and 7 Ω are connected in series across a 24 V battery.
What is the equivalent resistance of the circuit?
What is the equivalent resistance of the circuit?
a)
2 Ω
b)
12 Ω
c)
17 Ω
d)
22 Ω
34.
what is this symbol for?
a)
light bulb
b)
switch
c)
battery
d)
resistor
35.
This is an example of a _______ circuit
a)
open
b)
series
c)
parallel
d)
square
36.
This is an example of a ______ circuit
a)
Series
b)
Parallel
c)
Open
d)
Dihexihedral
37.
Electricity is the flow of _________.
a)
Protons
b)
Neutrons
c)
Electrons
38.
A series circuit has ____ path(s) that the electric current can take.
a)
One
b)
Two
c)
Three
d)
Four
39.
In a parallel circuit, if one connection is broken, all of the connections stop working.
a)
True
b)
False
40.
Mechanical energy is referring to:
a)
The Sun
b)
Heat
c)
Movement
d)
Robots
41.
Electrical work done per unit time is:
a)
electrical energy.
b)
electrical current.
c)
electrical power.
d)
electrical circuit.
42.
Electricity moves only in a __________ circuit.
a)
circuit
b)
difference in potential
c)
closed
d)
open
43.
When you remove a bulb from a three bulb circuit, and the other two bulbs go off, then the bulbs must have been connected in __________.
a)
parallel
b)
series
c)
open
d)
closed
44.
Does this statement best describe a parallel or a series circuit.
When more light bulbs are added they all remain bright.
When more light bulbs are added they all remain bright.
a)
Parallel circuit
b)
Series circuit
45.
Does this statement best describe a parallel or a series circuit.
Different voltages are dropped across each resistor.
Different voltages are dropped across each resistor.
a)
Parallel circuit
b)
Series circuit
46.
Does this statement best describe a parallel or a series circuit.
Different currents flow through each resistor.
Different currents flow through each resistor.
a)
Parallel circuit
b)
Series circuit
47.
Does this statement best describe a parallel or a series circuit.
If one part of the circuit fails, the other parts still work.
If one part of the circuit fails, the other parts still work.
a)
Parallel circuit
b)
Series circuit
48.
Does this statement best describe a parallel or a series circuit.
The total resistance is equal to the sum of the individual resistances.
The total resistance is equal to the sum of the individual resistances.
a)
Parallel circuit
b)
Series circuit
49.
The total resistance of a parallel circuit is always...
a)
greater than the sum of all the individual resistances.
b)
greater than any of the individual resistances.
c)
equalto the smallest of the individual resistances.
d)
less than any of the individual resistances.
50.
When another resistor is added to a parallel circuit, the total current...
a)
goes up.
b)
goes down.
c)
is unaffected.
100 %
