3. Def. of Electricity
Electric Current
Electric Potential & Potential Difference
Electromotive Force (emf)
Electric Circuit and components
Current and Voltage Measurements
4. Electricity is a form of an energy that can be
easily changed to many other forms
5. Electric Current is the flow of electric charge
Measured as the rate of flow of electric
charge
Denoted by I
I=Q/t
SI unit -> Amperes(A)
NOTE-Direction of CONVENTIONAL Current is opposite to direction of
flow of electrons.
6. Electric Potential - Work done in moving a unit charge from
infinity to a point
.∞
A .
Potential Difference – The difference between
potential at two points
.∞
B. A. Potential difference
8. Electromotive force is the same as
voltage.
E.m.f refers to the amount of energy
supplied by the electric source (eg.
battery) to each unit of electric charge
E.m.f is also measured by a voltmeter
9.
10.
11. To make an electrical appliance work, electricity
must flow through it.
The path along which the electric current moves
is called the electric circuit.
12. AN ELECTRIC CIRCUIT IS AN ELECTRICAL
DEVICE THAT PROVIDES A PATH FOR
ELECTRICITY TO FLOW.
13. Close circuit Bulb will light up
when switch is closed
Circuit diagrams for open and closed circuits
Open circuit bulb will not
light up
15. It must be connected in series in the circuit.
Positive side of ammeter must be connected
nearest to the positive terminal of the battery
(electric cell), and vice versa.
16. Voltmeters must be connected in parallel to
the circuit.
The positive side of voltmeter is connected
to the positive terminal of the cell, and vice
versa.
