Purpose of components Flashcards

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1
Q

What does a bulb do?

A

Emits light

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2
Q

What does a cell do?

A

Provides the circuit with a source of energy or emf

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3
Q

What does an LED do?

A

Allows current to flow in only 1 direction, and when current does flow through it, it emits light.

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4
Q

What does thermistor do in terms of resistance

A

a resistor that changes resistance as temperature changes.

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5
Q

What does a buzzer do?

A

To emit sound

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6
Q

What does a diode do

A

Allows current to flow only one direction

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7
Q

What does battery do?

A

provides circuit with a source of energy or emf

2 or more cells

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8
Q

What does a terminal do?

A

Provides a circuit with a source of energy or an e.m.f

eg. PSU

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9
Q

What does a fixed resistor do?

A

It is a resistor who’s resistance stays the same.

This allows it to limit the flow of current in an electrical circuit.

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10
Q

What does variable resistor/rheostat do?

A

controlsamount of eectric current flwoing in a circuit or through a component.

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11
Q

What does a fuse do? and purpose

A

A fuse is a safety device, which melts or blows if current in the circuit exceeds a specified value.

Its purpose is to protect the circuit and its components from damage due to excessive current.

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12
Q

What does a heater do in terms of energy

A

Transfers electrical energy into thermal energy as a useful form.

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13
Q

What does an LDR do?

A

Light dependant resistor whos resistance changes as light intensity level changes.
This changes the amount of current flowing through circuit.

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14
Q

What does a capacitor do?

A

Stores charge

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15
Q

What does 2 cells mean

A

2 or more cells means its a battery.

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16
Q

What does a junction of conductors do?

A

Allows electrical current to split at a junction.