Topic 4.3 - Electric Circuits Flashcards

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1
Q

Draw the circuit symbol for a switch

A
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2
Q

Draw the circuit symbol for a cell

A
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3
Q

Draw the circuit symbol for a battery

A
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4
Q

Draw the circuit symbol for a lamp

A
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5
Q

Draw the circuit symbol for a fuse

A
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6
Q

Draw the circuit symbol for a voltmeter

A
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7
Q

Draw the circuit symbol for an ammeter

A
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8
Q

Draw the circuit symbol for a diode

A
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9
Q

Draw the circuit symbol for a resistor

A
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10
Q

Draw the circuit symbol for a thermistor

A
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11
Q

Draw the circuit symbol for a variable resistor

A
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12
Q

Describe the current across a series circuit

A

The current is the same across all points in a series circuit.

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13
Q

Describe potential difference in a series circuit

A

Potential difference is split between components, according to the ratio of their resistances.

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14
Q

Describe current across a parallel circuit

A

The current is divided between the branches of the circuit.

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15
Q

Describe the potential difference across a parallel circuit

A

Each branch has a potential difference equal to the potential difference of the supply

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16
Q

What is total resistance in a series circuit?

A

The sum of the resistances from each component.

17
Q

Why is it advantageous to connect lamps in parallel?

A

If one lamp blows, the rest will be unaffected and can still receive current (i.e. the circuit is still complete).

18
Q

How do multiple power sources affect emf?

A

In series, the emfs of individual sources are added to give the total emf.

Emfs in parallel do not add.

19
Q

What is a thermistor?

A

A resistor in which resistance decreases as temperature increases.

20
Q

What is an LDR

A

A resistor in which resistance decreases as light intensity increases.

21
Q

What is a diode?

A

A component which only allows current to flow in one direction