Attribute
Definition
Layman
E.m.f
Energy per unit charge
supplied by a source of
electrical energy
EMF is the cause
The EMF is also present
even when no current is
drawn through the battery
(remains constant)
Voltage
Potential difference
between two points in
an electrical circuit
EMF remains constant.
Symbol
Unit
Measured
with
E
Volts (V)
V
Volts (V)
Voltmeter
Voltmeter
p.d
Potential difference from the
current passing through a
resistance within a circuit.
p.d is the effect
Potential difference across
the conductor is zero in the
absence of current.
Potential difference does not
remain constant - it depends
upon the
p.d