electric circuit

• the potential difference across a conductor is directly proportional to the current in the conductor at constant temperature 


  Ohm's Law
• the work done per unit charge by the source(battery) when no charge are flowing in the unit

  Emf
• the voltage measured across the terminals of a battery when charges are flowing in the circuit

  terminal potential difference
• the potential difference across the ends of a conductor is the energy transferred per unit electric charge flowing through it


  voltage
• a voltmeter has very high resistance and for this reason its is connected in parallel to the battery


  why is a voltmeter not connected in series
• the rate of flow of charge


  current strength /current
• one coulomb is the charged transferred in a conductor in one second if the current is one ampere


  one coulomb
• the ampere has very low resistance as it does not interfere with the circuit


  why is an ammeter connected in series
• the ratio of the potential difference across a resistor to the current in the resistor


  resistance
• the rate at which work is done

  power
• Emf is the maximum energy provided by a battery unit charge passing through it


  Internal resistance