Electric Currents, Resistance & Potential Difference Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. _____ is a type of diode which allows for reverse direction of current when a certain voltage is reached. It is often used as a voltage reference.

Question 2 2. Which diode would you use for fiber optic communications?

Question 3 3. This is the unit of measure for electrical power:

Question 4 4. This is the type of current we use now:

Question 5 5. A bar of graphite (carbon) has a resistivity of 5 x 10^-4 ohm-meter. The bar is 50 cm long and has a cross sectional area of 1 mm by 1 mm. What is the resistance of the bar in ohms?

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Question 6 6. Which of the following statements is true about the ohm as a unit?

Question 7 7. If you add an extra resistor to a series circuit, what will happen to the total voltage and total current in the circuit?

Question 8 8. What is a resistor?

Question 9 9. Which of the following symbols represents a resistor?

Question 10 10. Which of the following symbols represents a bulb?

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Question 11 11. Direct current:

Question 12 12. Alternating current:

Question 13 13. What units are used to describe electric potential difference?

Question 14 14. What is the potential difference between two locations if their individual potentials are 4.5 V and 2.3 V?

Question 15 15. A resistor is a component that resists the flow of _____.

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Question 16 16. Given a voltage of 20 volts applied across a resistor of 10 ohms, the power emitted (dissipated) by the resistor is _____.

Question 17 17. What is the apparatus used to measure electric charge and standardize the ampere unit?

Question 18 18. What is the abbreviation for the ampere unit?

Question 19 19. Resistivity is:

Question 20 20. If the temperature of a conductor increases, then:

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Question 21 21. When given the current and resistance, power can be calculated by:

Question 22 22. The unit of electrical power is the:

Question 23 23. How many electrons does it take to equal 100 coulombs of charge?

Question 24 24. How much charge passes a certain point in 10 seconds if the current is 10 amps?

Question 25 25. Diodes allow the current to flow in:

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Question 26 26. Which statement is true of electricity?

Question 27 27. What well-known expression does this picture represent?

Question 28 28. What is an electric circuit?

Question 29 29. What is a circuit diagram (or electrical schematic diagram)?

Question 30 30. The two types of current are:

Electric Currents, Resistance & Potential Difference Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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