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WorksheetsCh 20 Electricity
Total questions: 16
Worksheet time: 8mins
Name
Class
Date
1.
If an atom gains electrons, it becomes a
a)
positively charged ion
b)
negatively charged ion
c)
neutral atom
d)
neutral ion
2.
If the two charges represented in the figure were brought near each other, they would
a)
attract each other
b)
repel each other
c)
cause static discharge
d)
have no effect on each other
3.
Walking across a carpet is an example of charge being transferred by
a)
contact
b)
induction
c)
static electricity
d)
friction
4.
If a neutral metal comb is held near an object with a negative charge, the comb will become chaged by
a)
induction
b)
contant
c)
friction
d)
static discharge
5.
What type of current is produced by a battery?
a)
parallel current
b)
alternating current
c)
direct current
d)
potential current
6.
The type of current in your school is mostly
a)
direct current
b)
alternating current
c)
series current
d)
produced by batteries
7.
Resistance is affected by a material's
a)
thickness
b)
length
c)
temperature
d)
all of the above
8.
The current in a hair dryer measures 15.0 amps. The resistance of the hair dryer is 8 ohms. What is the voltage?
a)
120 V
b)
0.5 V
c)
7 V
d)
1800 V
9.
How many paths through which charge can flow would be shown in a circuit diagram of a series circuit?
a)
one
b)
two or more
c)
none
d)
more information is needed
10.
Most of the circuits in your home are
a)
series circuits
b)
parallel circuits
c)
reversible circuits
d)
closed circuits
11.
What is the unit of electric power?
a)
ampere
b)
volt
c)
watt
d)
ohm
12.
Information sent as patterns and codes in the controlled flow of electrons through a circuit is a(n)
a)
electronic signal
b)
digital signal
c)
analog signal
d)
integrated signal
13.
Electronic signals that are smoothly varying signals produced by continuously changing the voltage or current in a circuit are
a)
digital signals
b)
cathode rays
c)
diode signals
d)
analog signals
14.
Which of the following is made from a crystalline solid that conducts a current only under certain circumstances?
a)
vacuum tube
b)
cathode-ray tube
c)
analog device
d)
semiconductor
15.
A solid-state component with three layers of semiconductors is a(n)
a)
transistor
b)
diode
c)
vacuum tube
d)
resistor
16.
A thin slice of silicon that contains many solid state components is a(n)
a)
transistor
b)
integrated circuit
c)
diode
d)
cathode-ray tube
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