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Investigating electromagnetic induction Aim: * To investigate the factors that cause electromagnetic induction in a coil * To investigate the effect of the number of turns in a solenoid and the order of a magnet bar is inserted (whether it's pushed or pulled out) to the current induced in the electromagnet Hypothesis: Number of turns in solenoid will make the effect to the strength of the current induced and the order which the magnet is pulled out or pushed in will affect the direction of the induced electromagnetic field Variables: Dependent Independent Controlled Current * Number of turns in solenoid * Order of magnet inserted Same magnet Apparatus: Item Quantity Accuracy Styrofoam 1 - Solenoid 4 - Magnet 1 - Ruler 1 ± 1 cm Cable As needed - Ampere meter 1 - Diagram Methods: 1. Firstly, set up all materials that we need as the diagram shown 2. Then, drop the north end of a bar magnet towards the coils and insert it to the end for 10 times 3. Observe and record the reading on ammeter 4. Repeat it with bringing south pole towards and into the coil...

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