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Physics Equations > Physics Electricity > Flashcards

Physics Electricity Flashcards

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1
Q

For current to flow, there must be…

A

a closed circuit and a source of potential difference (battery/cell).

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2
Q

Electric current is the rate of…

A

flow of charge

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3
Q

In series, current is measure with…

A

Ammeter

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4
Q

In parallel, potential difference is measured using…

A

Voltmeter

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5
Q

Charge is measured in…

A

Coulombs

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6
Q

Current is measured in…

A

Amps

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7
Q

Potential difference is measured in…

A

Volts

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8
Q

Resistance is measured in…

A

Ohms

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9
Q

For an ohmic conductor, the current is ___ to the potential difference. This means the current is ____.

A

1) directly proportional
2) constant

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10
Q

When the resistance of a filament lamp increases the temperature of the lamp…

A

Increases

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11
Q

For a diode, the current only flows in
____. The diode has a very ____ resistance in the reverse direction

A

1) one direction
2) high

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12
Q

For a thermistor, as the temperature increases, the resistance…

A

Decreases

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13
Q

A thermistor is used in a…

A

Thermostat

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14
Q

For a light-dependent resistor, as light intensity increases, the resistance…

A

Decreases

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15
Q

In a series circuit, the current is the…

A

Same through all components

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16
Q

In a parallel circuit the current…

A

Splits at a junction

17
Q

In a series circuit, the potential difference is…

A

Shared between all the components

18
Q

In a parallel circuit, the potential difference is the…

A

Same across all branches

19
Q

In a series circuit, the total resistance is the sum of…

A

Individual resistances (Rom = R, + R,)

20
Q

In a parallel circuit, the total resistance is less than the…

A

Smallest individual resistance

21
Q

Direct current only flows in…

A

One direction

22
Q

Alternating current can…

A

Change direction

23
Q

UK mains electricity is an alternating supply with a frequency of ___ Hertz and about ___ Volts.

A

1) 50 Hz
2) 230 V

Physics Equations (2 decks)

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