10.3 Electrical circuits Flashcards

1
Q

Electric circuits

A

are the pathway travelled by electrical energy

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2
Q

energy source/power supply

A

pushes electrons around the circuit and provides the electrical energy eg. battery

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3
Q

energy user/load/resistor

A

converts electrical energy into other useful forms of energy eg. light globe

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4
Q

A CONDUCTING PATH

A

allows electrons to flow around the circuit eg. wires

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5
Q

What are gaps

A

A switch in circuits that control the flow of electricty

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6
Q

where does electricity come from

A
  • coal(mostly)
  • natural gas
  • nuclear energy
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7
Q

Alternatives from burning fossil fuels(better alternatives)

A

energy from the sun, wind and water(hydropower)

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8
Q

Why do we still use fossil fuels even though we shouldn’t

A

There are lots of companies that produce oil and there’s a lot of money invested in it. It’s also more effiecent.

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9
Q

When are electric currents formed

A

whenever there is electron flow.

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10
Q

How do you produce a larger current?

A

create a large electron flow

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11
Q

what unit is current measured in

A

Current is measured as ampere

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12
Q

Ammeters

A

Ammeters measure the amount of
electrons that flow through a circuit per second

measures current

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13
Q

Voltage

A

Voltage is a measure of the amount of forceneeded to move electrons in
the circuit.

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14
Q

Open circuit

A

An electric circuit that is brokenpreventign electrons from flowing around the whole circuit

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15
Q

How can energy in a electric circuit be transformed

A

The energy in an electric circuit can be transformed into sound or
light as it moves through a speaker or globe.

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16
Q

Potiental difference

A

The difference in energy

17
Q

Voltage is measured in

A

volts = V

18
Q

What can current be compared to(analogy)

A

the flow of water through a hose,

19
Q

What can voltage be compared to(analogy)

A

water pressure at the Tap/pump

20
Q

3 essential features of all electric circuits with examples

A

Voltage(power supply/energy source)-battery
Load/resistor-light bulb
Conductor-wire

21
Q

Simple circuit

A

A circuit with 3 necessary componets-voltage,conductive path and resistor/load

22
Q

What intstrument is current measured with

A

ammetre

23
Q

List three changes that can be made to an electric generator to increase the size of the electric current it produces.

A

increasing the speed of rotation of the coil

increasing the strength of the magnetic field

increasing the number of turns on the coil.

24
Q

polarized electrical component

A

a part with polarity, can only be connected in a circuit in one direction.