What is happening in the Wires?

Orientate the board so that the compass is aligned as shown in the picture to the right. 

1. Describe your observations when you turn the circuit on and off. 

2. How could you change the amplitude of the deflection? 

3. How could you change the direction of the deflection?

4. What evidence does this provide of the link between electricity and magnetism? 

You have been given 3 different resistors (Red, Blue and Green). It is known that the resistors have values of 5 Ω, 10 Ω, and 20 Ω. 

1. Develop a method to determine the relative size of the three resistors. 

2. Using all three resistors and 5 V from the power supply,

   1. create a circuit that has the brightest light. 

   2. create a circuit that produces the dimmest light. 

3. Sketch each of the circuits provided using the symbols below.

4. Provide a rationale for the shape of your circuit.

Using the following components, describe how each behave as a variation of a resistor.