ENERGY :
   Energy is a property which can be transferred to other objects or converted into different forms, but can't be created or destroyed. Energy is measured in Joules.
  There are different types of energy :
   
          Kinetic                                     Potential
          Mechanical                              Mechanical wave
          Chemical                                 Electric                           
          Radiant                                    Nuclear
          Ionisation                                Elastic
         Gravitational                            Rest
         Thermal                                   Heat
         Mechanical Work                    Magnetic

MULTIMETERS :

Are appliances that measure electric quantities: Voltage, current and resistance.

MEASURING VOLTAGE:

To measure voltage in a circuit, we have to connect the multimeter in parallel. The selection panel should show DC or AC. We select an appropiate value for measurement.