electric
.
www.UIE
, list ;) / ii. iii. 415 : ;
to
&
◦
§
emf the total
energy supplied per Coulomb of
charge by the cell
→
maintains a potential difference across ends of circuit
•
a
•
emf →
electromotive force
↳
voltage where the charge is gaining energy
potential difference →
voltage where charge is
losing energy within the external circuit
•
process chemical converted to electrical in cell to
converted heat resistor
energy to
→
energy
•
: • =
light lightbulb
• =
•
sound
•
chemical energy
→
flow of
current :
charge
→
components of circuit =
resistance to flow of charge
&
◦
§ to
conventional flow of positive charge from positive pole of cell around the circuit the pole of cell
to
negative
→
current
w h e a t m e a l - ts r
symbol unit
current I A Amperes
• -
•
charge Q / q C
-
Coulomb
•
potential diff .
V V -
volts ( across components of a circuit )
•
emf V -
volts ( of a cell )
•
resistance R n
-
Ohms
•
internal resistance r R -
Ohms
energy / work done
•
W J -
Joules
•
power P W -
Watts
symbols
.
www.UIE
, list ;) / ii. iii. 415 : ;
to
&
◦
§
emf the total
energy supplied per Coulomb of
charge by the cell
→
maintains a potential difference across ends of circuit
•
a
•
emf →
electromotive force
↳
voltage where the charge is gaining energy
potential difference →
voltage where charge is
losing energy within the external circuit
•
process chemical converted to electrical in cell to
converted heat resistor
energy to
→
energy
•
: • =
light lightbulb
• =
•
sound
•
chemical energy
→
flow of
current :
charge
→
components of circuit =
resistance to flow of charge
&
◦
§ to
conventional flow of positive charge from positive pole of cell around the circuit the pole of cell
to
negative
→
current
w h e a t m e a l - ts r
symbol unit
current I A Amperes
• -
•
charge Q / q C
-
Coulomb
•
potential diff .
V V -
volts ( across components of a circuit )
•
emf V -
volts ( of a cell )
•
resistance R n
-
Ohms
•
internal resistance r R -
Ohms
energy / work done
•
W J -
Joules
•
power P W -
Watts
symbols
