Electricity (Chapter P4) Flashcards

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1
Q

What do 2 objects with the same charge do

A

They repel from each other

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2
Q

What do 2 objects with different charges do

A

They attract each other

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3
Q

What is the equation for charge

A

Charge = Current x time

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4
Q

What is charge measured in

A

Coulombs, C

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5
Q

What is current measured in

A

Amperes, A

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6
Q

What way does the electron flow go in a circuit

A

To the right of the battery

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7
Q

What way does the conventional direction go in a circuit

A

To the left of the battery

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8
Q

What is the equation for potential difference

A

Potential difference = Energy transferred/Charge

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9
Q

What is potential difference measured in

A

Volts, V

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10
Q

What is energy transferred measured in

A

Joules, J

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11
Q

What is the equation for resistance

A

Resistance = Voltage/Current

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12
Q

What is resistance measured in

A

Ohms

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13
Q

How does the resistance of a wire change if the length increases

A

It increases as well

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14
Q

What does “in series” mean

A

It means when a component is in the same circuit as the the rest of the components

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15
Q

What does “in parallel” means

A

It means when the component is branched off the main circuit

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16
Q

What is a thermistor

A

It is a resistor that changes resistance as the temperature changes
(As the temperature increases, the resistance decreases)

17
Q

What is a LDR’s

A

It is a resistor which changes resistance based on the light intensity
(As the light intensity increases, the resistance decreases)

18
Q

What is the equation for power

A
Power = Energy transfer/time
Power = Voltage x Current
19
Q

What does a perspex rod rubbed with a cloth become

A

Positively charged

20
Q

What does a polythene rod rubbed with a cloth become

A

Negatively charged