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Midterm Exam

Midterm  Exam

Q • Question 1 10 out of 10 points The power absorbed by Rx is 20 mW. Find Rx. Provide all steps to find the answer • Question 2 5 out of 10 points Two D-cell flashlight model is shown. Determine power dissipated in the lamp. Provide all steps to find answer. • Question 3 10 out of 10 points Which of the following is a form of Ohm's Law? • Question 4 10 out of 10 points Figure 3-7 Given the circuit in Figure 3-7, what is the battery voltage? • Question 5 10 out of 10 points You found a real bargain on a dashboard fan at a flea market. When you got home, you discovered it was a 6 volt fan that would draw 500 mA at 6 V. Your car has a 12 V system. You need a resistor that will drop 6 V at 500 mA. What value resistor do you need?

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Selected Answer: Power absorbed by Rx is 20mW P=I^2 . Rx 20 x 10^3 = (2 x 10^3)^2x Rx 20 x 10^-3/4 x 10^-6= Rx Rx = 5000 ohms = 5 kohms Correct Answer: [None] Response Feedback: [None Given] Selected Answer: Power = (Voltage across x i lamp) = 3 x 3 Power = 9V Correct Answer: [None] Response Feedback: How is i lamp calculated? -5 pt