page 544-522 notes

1. I is the symbol for current and it is measured in A(ampere).
Q is the total amount of charge moving past a point in a conductor and is measured in coulombs(C).
t is the time taken to complete the process.

2. Q=Ne or N=Q/e
Q is the charge moving past a point in a conductor.
N is the number of electrons passed through Q.
e is the charge of one electron.

3. An ammeter measures the currents and it must be wired to all devices to be functional for current to flow through it.


4. Conventional current is the positive charge.

5. Direct currents flow in a single direction until it reaches it's destination.

6. The destination which consumes the energy from the Direct currents is called a load.

7. The alternating current is a current going in the direction reversed to which way it should flow to by using electrical or magnetic forces.

8. A circuit is the path of a current which helps the current flow from it's negative to it's positive side.

9. The electrical potential difference is symbolised as V using the equation:

V= E/Q

Q is the electrical potential of a charge.
E is the energy required to increase Q.
V is the potential difference.

10. Since V= E/Q , I= Q/T

E= VQ, Q=It









therefore E=VQ
                 =VIT
11. VIT is used to calculate the amount of joules of energy used.