topic 1

• Units for length


  metres (m)
• Units for mass


  kilograms (kg)
• Units for time


  seconds (s)
• Units for current

  amperes/amps (A)
• Units for temperature


  Kelvin (K) or degrees Celsius (C)
• Units for frequency

  Hertz (Hz)
• Units for force


  Newtons (N)
• Units for energy or work done

  Joules (J)
• Units for power

  Watts (W)
• Units for pressure


  Pascals (Pa)
• Units for charge

  Coulombs (C)
• Units for potential difference

  Volts (V)
• Units for resistance


  Ohms (Ω)
• Units for magnetic flux density

  Tesla (T)
• Symbol for length


  l or x
• Symbol for mass


  m
• Symbol for time


  t
• Symbol for current


  I
• Symbol for temperature


  T
• Symbol for frequency


  f
• Symbol for force


  F or W
• Symbol for energy


  E or WD
• Symbol for power


  P
• Symbol for pressure


  P
• Symbol for charge


  Q
• Symbol for potential difference

  V
• Symbol for resistance


  R
• Symbol for magnetic flux density

  B
• Symbol for giga


  G
• Symbol for mega


  M
• Symbol for kilo


  k
• Symbol for centi


  c
• Symbol for milli


  m
• Symbol for micro


  μ
• Symbol for nano


  n
• Power of 10 for giga

  x1000000000
• Power of 10 for mega

  x1000000
• Power of 10 for kilo

  x1000
• Power of 10 for milli

  ÷1000
• Power of 10 for micro

  ÷100000