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Unit 10 Electricity

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1.
2 points
An electrical cord uses
2.
2 points
Electric current can flow only through
3.
2 points
The resistance is of a wire is NOT affected by the wire's
4.
2 points
Too much current flowing through a wire might cause
5.
2 points
The units used to measure resistance are called
6.
2 points
A circuit in which electrons can follow more than one path is called a
7.
2 points
The force that make electrons move is called
8.
2 points
If a 20-volt battery is running a toy that has 4 ohms of resistance, the current is (divide)
9.
2 points
The negative part of an atom is called the
10.
2 points
The kind of electric current used by power plants is
11.
2 points
The part of an atom that causes electricity is the
12.
2 points
Wires carrying direct current become
13.
2 points
Of the following materials, the best conductor is
14.
2 points
Of the following parts, the one that is NOT found in a dry cell is
15.
2 points
Electricity can flow easily through all
16.
2 points
Current is measured in
17.
2 points
An appliance that uses 11 amps of current when it is plugged into a 110 volt outlet has a resistance of (divide)
18.
2 points
Electric current that changes direction at a regular rate is
19.
2 points
According to Ohm's law, current is equal to
20.
2 points
If several appliances are connected in series and one of the appliances stops working
21.
2 points
A circuit breaker is useful in case there is
22.
2 points
Electric current moves from a positive pole to a negative pole.
23.
2 points
It is SAFE to connect several extension cords together.
24.
2 points
It is NOT SAFE to fly kites near power lines.
25.
2 points
The positive and negative pole of a battery is also called an
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