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PART B: Open-ended Question: Show solution or explanation where appropriate 1. In the circuit shown, 6A of electric current is flowing. R = ? I=6A E = 24 V a) Is the current direction shown for the conventional current or the real current? b) What is the voltage drop across the lightbulb? c) What is the resistance of the lightbulb? 2. A block (m=20kg) is at rest on the floor. a. what can you conclude about the net force acting on the block in the horizontal and vertical directions? c. Draw FBD of the block. Label the forces. d. What is the normal force acting on the block? 3. Three positive point charges of equal magnitude are arranged on three of the corners of an equilateral triangle with side d as shown in the figure. Sketch the net electric force acting on the charge at the top of the triangle. Draw a FBD of the charge at top of triangle. Use head-to-tail method to determine the direction of the net force. Comment on the relative lengths of the vectors d O O d 5. In each set of waves below, the two waves at the top represent two waves traveling at the same time. Combine the two waves and show the results at the bottom graph