In Investigation One, you will explore voltage, current, and resistance. During this Investigation, you will:

1. Construct a simple circuit using (1) one battery and resistor “A”.
2. Construct a simple circuit using (2) two batteries and resistor “A”.
3. Construct a simple circuit using (3) three batteries and resistor “A”.
4. Construct a simple circuit using one, two, and three batteries and resistor “B”.
5. Calculate the amount of resistance from resistors “A” and “B” using the following formula for Ohm’s Law:

In Investigation Two, you will study the relationship between voltage, current, and resistance. During this Investigation, you will:

1. Construct a circuit with (4) four batteries and one resistor “B” then with one resistor “B” and determined the voltage for each.
2. Build a circuit with (4) four batteries and one resistor “C”.
3. Calculate the area of the resistor barrel using the following formula:
4. Construct a circuit with two 1000 Ω resistors in series and record the voltage and current.
5. Determine the length and area of both 1000 Ω resistors.
6. Construct a circuit with two resistors in a parallel circuit.
7. Calculate the amount of resistance supplied by (a) the single resistor, (b) the two resistors in series, and (c) the two resistors in parallel using Ohm’s Law:

In Investigation Three, you will study electricity and magnetism. During this Investigation, you will:

1. Construct a circuit with one, then, two, then three batteries and an electromagnet.
2. For each circuit, you will record the current and determined how many paperclips you could pick up using the electromagnet.
3. Calculate the magnetic field using the following formula:

4. Measure the length of the coil on the electromagnet, then calculate the ratio of the number of turns of the wire using the following formula:

5. Investigate the effect of adding more turns to the electromagnet on the magnetic field in a circuit with four batteries to see how many paperclips you can pick up with the electromagnet.

This Performance Assessment is designed to allow students to solve a problem using the:

• concepts with which they have become familiar during the previous three Investigations, and
• procedures used during the previous three Investigations.