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WorksheetsIPC Electricity
Total questions: 20
Worksheet time: 2hrs 40mins
Which value best represents the resistance of a toaster that draws 12 amps of electricity on a 120 volt line?
0.1 Ohms
132 Ohms
10 Ohms
1440 Ohms
What is the current in a copper wire that has a resistance of 2 ohms and is connected to a 9-volt electrical source?
4.5 amps
.22 amps
11.0 amps
18.0 amps
How much current is flowing through the pictured circuit?
12.5 amps
.4.0 amps
3.1 amps
0.32 amps
Which circuit is built so that if one light goes out, the other three bulbs will continue to glow
A
B
C
D
Why are most household circuits parallel rather than series?
Parallel circuits carry less current than series circuits
Parallel circuits allow some lights to be used when others are off
Parallel circuits don't require fuses
Parallel circuits are easier to build
Which switch if opened, will cause the light bulb to stop glowing?
T
S
Q
R
Removal of which lightbulb will interrupt the circuit and cause all the other bulbs to fail to glow?
Lightbulb T
Lightbulb S
Lightbulb R
Lightbulb Q
Copper is a good electrical conductor and used in electric circuits because-
electrons flow readily through the metal
no electrons flowing through the metal
it has a high melting point
it is a good insulator
A 100-watt lightbulb is lighted by a 100-volt power source. Which value represents the current flowing through the bulb?
10000 amperes
200 amperes
1 ampere
100 amperes
The picture shows an incomplete circuit. To complete this as a series circuit in which both lighbulbs will glow, a wire must connect these points:
Q & S
R & S
Q & T
R & T
The values shown in the table are a measure of how much current will flow in a standard sample of metal. Which metal is the best conductor?
Aluminum
Silver
Iron
Copper
An open circuit
allows electricity to flow
requires little voltage
does not allow electricity to flow
has no resistance
How much current is flowing through the circuit shown?
1.81 amps
8.0 amps
14.5 amps
0.55 amps
When a piece of glass is inserted into a simple circuit, the lightbulb of the circuit does not light up. Under these conditions this would mean the glass is a(n)
resistor
insulator
conductor
capacitor
A 6.2 volt battery sends a 0.44 amp current through a miniature lightbulb. Calculate the resistance for the bulb. Give the answer in ohms, using two decimal places.
2.72 ohms
.0710 ohms
14.09 ohms
27.20 ohms
I. When one component of the circuit goes out, the rest continue working
II. Additional components can be added without increasing resistance
III. There is one pathway for the electrical current to pass through.
Which advantages above only apply to parallel circuits?
I only
II only
I, II, and III
I and II
A negatively charged rod is held near an uncharged metal ball. This will cause the metal ball to--
become polar
be unaffected
become positively charged
become negatively charged
Which of the following would demonstrate an electrical force that is repelling the two objects?
A positively charged object and a negatively charged object
A negatively charged object and a neutral object
Two positively charged objects
Two neutral objects
A positively charged object is placed a short distance from a negatively charged object. What would happen to the objects if the distance between them doubled? The objects would--
repel each other with less force
attract each other with greater force
repel each other with greater force
attract each other with less force
In this circuit, how much current flows through the bulb?
1.50 amps
.75 amps
2.0 amps
3.0 amps
