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Physics + Earth And Space (JC) > current electricity > Flashcards

current electricity Flashcards

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1
Q

Electrical energy

A

Energy that comes from a charge

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2
Q

Current electricity

A

The flow of electrons through a circuit

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3
Q

Electric circuit

A

A loop that allows electrons to flow continuosly

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4
Q

Ammeter

A

An instrument used to measure current

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5
Q

Ampere/Amp

A

Unit for current

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6
Q

Electrons flow from the ___________ pole of the battery to the __________ pole

A

negative pole of the battery to the positive pole

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7
Q

Insulator

A

A material that doesn’t let current electricity flow

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8
Q

Conductor

A

A material that lets current electricity flow

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9
Q

Resistance

A

How difficult it iis for a current to flow through an electrical component

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10
Q

Ohmeter

A

Measures resistance

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11
Q

Unit for resistance

A

Ohm

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12
Q

Potential difference

A

(Voltage) The pushing force from an electrical power source that makes electrons move through a circuit

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13
Q

Voltmeter

A

Instrument used to measure potential difference

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14
Q

Unit for potential differemce

A

Volts

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15
Q

Ohm’s law

A

/V\
/I R\

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16
Q

Electrical power formula

A

P = V(I)
Power = Voltage x Current

17
Q

Series circuit

A

All components are connected in a single loop

18
Q

Parallel circuit

A

The components are connected in more than 1 loop or branch

19
Q

Series circuit:
Description, Current, voltage, if a bulb blows

A

Description; Single loop
Current; Current is the same for all components
voltage: Divided between components
if a bulb blows: All lights turn off

20
Q

Parallel circuit:
Description, Current, voltage, if a bulb blows

A

Description: Branches
Current: Spit across different branches
voltage: The same as the source for each component
if a bulb blows: Only lights on the incomplete branch turn off

21
Q

Direct current

A

Current flows in 1 direction

22
Q

Alternating current

A

Current flows in both dirrections

23
Q

Rectifier

A

Converts alternating current into direct current for appliances

24
Q

Diode

A

Only allows the current to flow in 1 direction

25
Q

LED

A

Light Emitting Diode

26
Q

LDR

A

Light Dependent Resistor

27
Q

Circuit breakers

A

If the current is too strong, the circuit breaker will turn the circuit off to prevent an overload

28
Q

Fuses

A

If a fault occurs, the fuse melts, breaking the circuit

Physics + Earth And Space (JC) (8 decks)

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