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Physics > Electricity > Flashcards

Electricity Flashcards

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1
Q

electric 1.____ is the flow of electrical 2._______

A

1.current 2.charge

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2
Q

The greater the rate of flow the 1._______ the current

A

higher

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3
Q

What is current measured in?

A

Amperes (A)

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4
Q

What is amperes often abbreviated to?

A

Amps

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5
Q

What is electrical charge often measured as?

A

Coulombs (C)

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6
Q

What equation is used to calculate coulombs?

A

Charge flow = current x time

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7
Q

What is the equation to calculate coulombs using only letters?

A

Q=It

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8
Q

What is the resistance of a component measuring?

A

the resistance of a component

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9
Q

what happens when the resistance is high

A

It is more difficult for the charge to flow

the current is lower

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10
Q

What does the potential difference tell us?

A

the difference in electrical potential from one point in the circuit to another

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11
Q

What is another name for the potential difference?

A

voltage

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12
Q

What happens when the potential difference is large across a component?

A

The greater the flow of charge is throughout the component

and the current is bigger

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13
Q

What is the equation to work out the potential difference?

A

Potential difference = Current x Resistance

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14
Q

What is the equation of potential difference using letters only?

A

V=IR

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15
Q

What is the potential difference graph used to do?

A

the relationship between the potential difference and the current for any component

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16
Q

in a potential difference graph what is the origin?

A

The origin is where the axis intersect and is pretty much always plotted as (0,0)

17
Q

In a potential difference graph what does it mean if there is a straight line through the origin?

A

The voltage and the current are directly proportional

18
Q

In a potential difference graph what does a steep gradient mean?

A

low resistance ,as a large current,will flow for a small potential difference

19
Q

In a potential difference graph what does it mean if the gradient is shallow?

A

A high resistance,as a large potential difference is needed to produce a small current

Physics (23 decks)

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