P2 Physics - static energy, current and voltage Flashcards

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1
Q

what happens when a substance loses electrons?

A

it becomes positively charged

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2
Q

what happens when a substance gains electrons?

A

it becomes negatively charged

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3
Q

if the charges of a substance are the same what happens

A

they repel

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4
Q

if the charges of a substance are opposite what happens

A

they attract

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5
Q

when can a current flow?

A

when an electric charge flows through a resistor

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6
Q

what is current measured in?

A

amps

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7
Q

what is current measured with?

A

an ammeter

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8
Q

what is voltage measured in

A

volts

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9
Q

what is is voltage measured with?

A

voltmeter

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