voltage Flashcards

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1
Q

what does a voltmeter measure?

A

the potential difference between 2 points in the circuit

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2
Q

voltmeters have to be attached in?

A

parallel

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3
Q

what 2 roles does the cell have within the circuit?

A
  • drives the current around the circuit
  • transfers energy to the components
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4
Q

what is voltage?

A

the energy transferred per unit charge passed

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5
Q

what is a volt?

A

a joule per coulomb

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6
Q

formula for voltage?

A

energy / charge

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7
Q

formula for voltage( with resistance) ?

A

voltage = current x resistance

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