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Science year 7 > Circuits > Flashcards

Circuits Flashcards

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1
Q

Name 10 components of a circuit

A

Buzzer,bulb,resistor,cell,battery,
ammeter, voltmeter, fuse,switch and wire

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2
Q

Describe a series circuit

A

The bulbs get dimmer as more are added because it is all shared. If one bulb stops working, all of them will

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3
Q

Describe a parallel circuit

A

The bulb have the same brightness no matter how many bulbs are added. If one bulb stops working, the others will continue to work

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4
Q

What is in an atom

A

Electron ( negative )
Proton ( positive )
Neutron ( neutral )

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5
Q

Describe the current in a series

A

It is the same all the way round

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6
Q

Describe the current in a parallel circuit

A

It is shared between the components

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7
Q

What is potential difference

A

Potential difference is voltage which tells us how much push of electrons there is.

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8
Q

Should an ammeter be connected in series or parallel?

A

Series

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9
Q

Should a voltmeter be connected in series or parallel?

A

Parallel

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10
Q

In a parallel circuit is the voltage different or the same in any point of the circuit

A

The same

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11
Q

In a series, is the voltage the same or different in any point of a circuit

A

Different

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12
Q

What is the calculation for resistance and what is it measured in?

A

Resistance( Ω )=Voltage ( V ) / Current ( A )

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13
Q

If a wire is longer, will the resistance be greater than a shorter wire?

A

It will be greater than a shorter wire

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14
Q

What is energy measured in?

A

Joules

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15
Q

What is the unit of charge

A

Coulomb

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16
Q

What is current measured in?

A

Amps / Ampere

17
Q

What is voltage / potential difference measured in?

A

Volts

18
Q

More electrons is a … type of charge

A

Negative charge

19
Q

More protons are a… charge

A

Positive charge

20
Q

What is the rule for negatives and positives attracting to each other

A

Opposites attract
Like charges repel

21
Q

What is the calculation for voltage?

A

Current x resistance OR energy / charge

22
Q

What is the calculation for current

A

Charge / time or Power / P.D

23
Q

What is a diode

A

A diode only lets current flow in one direction

24
Q

What is an LED

A

A light emitting diode

25
Q

What is the name for an atoms of the same element with a different amount of neutrons

A

Isotope

Science year 7 (2 decks)

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