The Factors that Affect the Amount of E.M.F. Being Produced

The Factors that Affect the Amount of E.M.F. Being Produced

Planning

Aim

To find the factors that affect the amount of E.M.F. being produced.

The amount of E.M.F. produced during the experiment when each type of

factors is change.

Background knowledge

Electro-motive-force is the energy being supply to a charge. Battery

is a type of energy. The energy that it provides is voltage. Battery

voltage is sometime called electro-motive-force because it is used to

"pump" around the electrons in the wire. The force can be generates by

the moving of magnetic field as in the left-hand rules (field, current

and force). It is the force that pushes the electrons around the

circuit from the positive pole to the negative pole. That is why

current directions in circuits are always marked from positive to

negative.

The voltage of the batteries varies in many volts e.g. 1.5V, 6V etc. A

battery with a voltage of on volt is able to deliver one joule of

energy for each coulomb of charge that passes through it. In other

words, the voltage of a battery is the number of joules per coulomb

that the battery can deliver when it is connected in a circuit.

The law of left-hand rules or Fleming rules is that:

* Thumb is for Motion.

* First finger is for Field.

* Second finger is for Current.

Hypothesis

* Does the change of frequency of the current affect the amount of

electro-motive-force being produced?

* Does the change of current affect the amount of electro-motive-force

being produced?

* Does the number of coil of green wire affect the amount of

electro-motive-force being produced?

* Does the number of coil of wire use for magnetizing the irons affect

the amount of electro-motive-force being produced?

Apparatus

1. AC power supply - provides electricity to the circuit.

2. Signal generator - for providing the electricity the circuit and

also for changing the frequency of the current.

3.