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Biblioteka

Savvas 7th Grade Electricity Test

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Posljednje ažuriranje almost 3 years ago
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Pitanje 1
1.

The build-up of charges on an object is called

Pitanje 2
2.

What happens when an object is rubbed against another object to charge by friction?

Pitanje 3
3.

What causes charges to move in a circuit?

Pitanje 4
4.

The ampere is a unit of

Pitanje 5
5.

According to Ohm’s law, resistance is equal to voltage divided by

Pitanje 6
6.

Materials through which charge can flow easily are called

Pitanje 7
7.

An example of an insulator is

Pitanje 8
8.

Batteries and power plants are examples of

Pitanje 9
9.

Which of the following does not determine the resistance of a wire?

Pitanje 10
10.

Lisa built an electric circuit. When she added a seond light bulb, the first bulb became dimmer. What type of circuit did Lisa build?

Pitanje 11
11.

A complete, unbroken path through which electric charges can flow is a(n)

Pitanje 12
12.

Your alarm clock has a voltage of 120 V and a resistance of 1200. What current does the alarm clock draw?

Pitanje 13
13.
Pitanje 14
14.
Pitanje 15
15.
Pitanje 16
16.
Pitanje 17
17.
Pitanje 18
18.
Pitanje 19
19.

As the temperature of most conductors increases, the resistance decreases.

Pitanje 20
20.

Electric charges that are different attract each other.

Pitanje 21
21.

The electrons in an insulator are tightly bound to their atoms.

Pitanje 22
22.

The unit of measure for voltage is the ohm.

Pitanje 23
23.

For a constant voltage, increasing the resistance will cause the current to decrease.

Pitanje 24
24.

What are the basic features of an electric circuit?

Pitanje 25
25.

How is current related to resistance?

Pitanje 26
26.

Explain why you may produce a static discharge if you touch a metal door knob after walking on a wool carpet.

Pitanje 27
27.

Which circuit illustration represents circuit B?

Pitanje 28
28.

Look at the diagram in question 27. Will removing bulb 1 in circuit B cause bulb 3 to go out? Explain.