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Physics 2 > 88-91 Devices and Types of Circuits > Flashcards

88-91 Devices and Types of Circuits Flashcards

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1
Q

What is significant about the current in a diode?

A

It only flows in one direction

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2
Q

What material is a diode made from?

A

Semiconductor material such as silicon

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3
Q

What is an LDR?

A

A resistor dependent on light intensity

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4
Q

When is resistance in an LDR highest?

A

In darkness

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5
Q

What are some applications of LDRs?

A

Automatic night lights

Burglar detectors

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6
Q

What is a thermistor?

A

Temperature dependent resistor

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7
Q

What is the relationship between temperature and resistance in a thermistor?

A

Temperature increase, resistance decrease

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8
Q

What are some applications of thermistors?

A

Temperature detectors in car engines and thermostats

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9
Q

What is a series circuit?

A

A circuit that you can follow without interruptions

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10
Q

What is shared in a series circuit?

A

Potential difference

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11
Q

What is the same throughout series circuits?

A

The current

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12
Q

What is the size of the current in a series circuit determined by?

A

The PD of cells / total resistance

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13
Q

What adds up in a series circuit?

A

Total resistance

Cell voltages

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14
Q

What’s the main difference between series and parallel circuits?

A

In parallels one component can be removed

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15
Q

What can be said about PD in parallel circuits?

A

The same throughout

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16
Q

What can be said about the current in parallel circuits?

A

Current is shared

current through each component added up = total current

17
Q

Where should ammeters and voltmeters go in a parallel circuit?

A

A - always series

V - always parallel

18
Q

What is the advantage of connecting fairy lights in series?

A

Each bulb only needs a small share of the voltage

19
Q

What in a parallel circuit adds up?

A

Current (A)

20
Q

What in a parallel circuit remains the same which does not in a series circuit?

A

Voltage stays the same for each bulb in a parallel circuit

21
Q

Why must a car be wired with a parallel circuit?

A

Everything can be used sepearately

Verything gets full voltage from battery

Physics 2 (11 decks)

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