1. Identify the electrical properties of materials that are highly conductive and those that are used in insulation. Use one or two sentences.

2. Given a 10-V power supply, would a 20-ohm resistor and a 5-ohm resistor need to be arranged in parallel or in series to generate a current of 2.5 A? How much current would move through each resistor? In 3-4 sentences, answer each question and explain your answers.

3. In one to two sentences, explain the importance of applying Kirchhoff's Junction Rule in circuit design.

4. Applying Kirchhoff's Junction Rule, what happens to the power source and current when the parallel circuit has two branches, each with a resistor, R? In one to two sentences, answer the question and explain your reasoning.