Electricity Flashcards

(31 cards)

1
Q

Define Voltage

A

Energy transferred per unit charge

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2
Q

Define Current

A

Rate of flow of charge

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3
Q

What are the charge carriers in a circuit

A

Electrons

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4
Q

Define the power rating of an appliance

A

Energy used per second

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5
Q

What is the symbol for charge

A

Q

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6
Q

What is the symbol for voltage

A

V

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7
Q

What is the symbol for current

A

I

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8
Q

What is the symbol of resistance

A

R

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9
Q

Adding resistors in parallel will do what tot the overall resistance?

A

Decreases the overall resistance.

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10
Q

What is ohm’s law?

A

V=IR

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11
Q

What will happen to the current in a circuit with constant resistance when the voltage increases?

A

The current increases.

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12
Q

What happens to the resistance of an LDR if the light level increases?

A

Resistance decreases.

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13
Q

What happens to resistance of a thermistor if the temperature goes up

A

Resistance decreases.

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14
Q

What is the symbol of power?

A

P

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15
Q

State the units of Voltage

A

Volts (v)

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16
Q

State the units of Power

17
Q

State the units of current

18
Q

State units of resistance

19
Q

State units of Charge

20
Q

Which type of fuse would be used in a 500 W appliance?

21
Q

Which type of fuse would be used in a 800 W appliance?

22
Q

What is used to measure voltage

23
Q

What is used to measure Current

24
Q

What is used to measure resistance

25
How is a voltmeter connected?
In parallel
26
How is an ammeter Connected?
In series.
27
In a parallel circuit current will...
In a parallel circuit current will split between branches.
28
If a large and small resistor are connected in parallel, which will receive more current?
Small resistor. Current will take path of least resistance.
29
In a parallel circuit the voltage will...
In a parallel circuit the voltage will be equal to the supply across each branch.
30
In a series circuit voltage will...
be shared between components.
31
In a series circuit current is...
the same at all points.