Savvas 7th Grade Electricity Test

1

The build-up of charges on an object is called

1

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

1

What causes charges to move in a circuit?

1

The ampere is a unit of

1

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

1

Materials through which charge can flow easily are called

1

An example of an insulator is

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Batteries and power plants are examples of

1

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

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

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

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

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The law of _______ of charge states that charges are not created or destroyed.

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11. In a(n)_______ circuit, the different parts of the circuit are on separate branches.

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The continuous flow of charges through a material is called electric _______ .

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When the electric field of one object causes a transfer of electrons from one part to another in a second object, without the two objects touching,  it is called_______ .

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The transfer of charge when electrons move from a charged object to another object by direct contact is called _______ 

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The resistance of a parallel circuit _______ as you add more branches.

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

1

Electric charges that are different attract each other.

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

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The unit of measure for voltage is the ohm.

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

3

What are the basic features of an electric circuit?

2

How is current related to resistance?

1

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

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Which circuit illustration represents circuit B?

1

The build-up of charges on an object is called

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

What causes charges to move in a circuit?

The ampere is a unit of

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

Materials through which charge can flow easily are called

An example of an insulator is

Batteries and power plants are examples of

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

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

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

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

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

Electric charges that are different attract each other.

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

The unit of measure for voltage is the ohm.

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

What are the basic features of an electric circuit?

How is current related to resistance?

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

Which circuit illustration represents circuit B?

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