Physics-Electricity

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  • Created by: JamieH98
  • Created on: 08-04-13 21:55
How do calculate charge?
Q=It (Charge=Current×time)
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What is current?
Current is the rate at which charge flows; it is the amount of charge passing in 1 unit of time
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what can electrons do in a conductor?
Electrons are free to move in a conductor
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In an insulator what are the electrons like?
In an insulator all the electrons are all bound in the atom
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How do you measure current in a circuit experiment?
To measure current you place an ammeter in series into a circuit
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What is the voltage of a supply?
The voltage of a supply is a measure of the energy given to the charges in a circuit.
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What is voltage measured in?
Measured in Volts
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How do you measure voltage in a circuit experiment?
A Voltmeter is placed across the component being measured in parallel
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What does the brightness of a light tell us?
The brightness of the lamp is a measure of the energy supplied
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If the power supply increases what happens to the voltage and brightness?
As the power supply increases as does the voltage and so the brightness increases
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What is an electric current?
Voltage applied to a circuit provides energy and causes charges to flow and the rate of flow of charge is called electric current.
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What does increasing the resistance do to the current?
Increasing the resistance decreases the current
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How do you measure resistance?
R=V/I (Resistance=Voltage/Current) V=IR
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In a series circuit how many routes are there for the energy to flow?
In a series circuit there is only one route for the charge to flow
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What is the same in a series circuit?
In a series circuit the current is the same at every point in the circuit
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What adds up to the supply in a series circuit?
In a series circuit the voltage adds up to the voltage of the supply
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In a parallel circuit how many routes are there for the energy to flow?
In a parallel circuit there is more than one path for the charges to flow
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what adds up to the supply in a parallel circuit?
In a parallel circuit the current adds up to the current of the supply
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What is the same in a parallel circuit?
In a parallel circuit the voltage is equal everywhere
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Describe the energy transfers in a lamp?
In a lamp electrical energy is transformed into heat and light energy
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What is power?
Power is the rate at which energy is transformed
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What is energy measured in?
Energy is measured in J
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How do you calculate energy?
E=P×t
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How do you calculate power given the current and the voltage?
P=I×V
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Show the equation for current in a parallel circuit?
It=I1+I2=I3
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Show the equation for current in a series circuit?
It=I1=I2=I3
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Show the equation for voltage in a parallel circuit?
Vt=V1=V2=V3
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Show the equation for voltage in a series circuit?
Vt=V1+V2+V3
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Other cards in this set

Card 2

Front

What is current?

Back

Current is the rate at which charge flows; it is the amount of charge passing in 1 unit of time

Card 3

Front

what can electrons do in a conductor?

Back

Preview of the front of card 3

Card 4

Front

In an insulator what are the electrons like?

Back

Preview of the front of card 4

Card 5

Front

How do you measure current in a circuit experiment?

Back

Preview of the front of card 5
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Comments

Grasshopper

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is the 'show the equation for current in a parallel circuit', correct?

It=I1+I2=I3?

I thought maybe the second '=' sign was supposed to be a '+'...? :/

JamieH98

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Sorry for any inconveniance, you are right It=I1+I2+I3 in a parallel circuit. This is what i put as the right answer when making the quiz but it just does that.

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