A voltmeter in a circuit

A voltmeter in a circuit measuring potential difference between two points

ZIMSEC O Level Combined Science Notes: Potential difference

  • Potential difference is the “electrical pressure” which causes current to flow in a circuit
  • The amount of current flowing depends on the potential difference of the circuit
  • Potential difference is also known as voltage 
  • It is measured in volts
  • For electrons to flow in a circuit there must be a force to push them
  • The force is provided by the cells
  • The more cells there are the greater the pushing force
  • This force or voltage is measured using a voltmeter
  • A voltmeter measures the potential difference between two points in a circuit
  • It does not measure the potential difference (p.d.) for the whole circuit
  • The voltmeter is thus connected between the two points being measured
  • Voltmeters are thus connected in parallel
  • Ammeters are connected in series
  • If the pushing force in a circuit is increased more electrons should flow through it

To access more topics go to the Combined Science Notes page.


Quick NetOne, Telecel, Africom, And Econet Airtime Recharge

If anything goes wrong, click here to enter your query.