Voltage and Current

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6 Terms

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Voltage

The energy given to electrons that makes them move around the circuit

2
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Current

The rate of flow of charge

3
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Charge

The charge flow in one second when the current is one amp

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How does the power source move charge around a circuit?

The power sources does work to move charge around the circuit

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Potential difference

The work done in moving a unit charge between two specific points

OR

p.d. is 1 volt when 1 joule of energy is used to move 1 coulomb of charge through a component

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Describe what happens in a circuit

  • The positive terminal has a potential 1.5V higher than the negative

  • Negative charges are attracted to the positive terminal and pass through the bulb

  • Their potential energy is converted to heat

  • When charges reach the positive terminal they have no potential energy left

  • The battery moves the electrons to the higher potential (expending chemical energy to do so)

  • Electrons continue to move around the circuit until they can no longer be promoted to the higher potential