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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. What is the abbreviation for the ampere unit?

Question 2 2. A copper voltameter uses a square cathode plate measuring 7 inches on each side. The current density is kept at 10 amperes per foot. What current is required to deposit copper fully on both sides of the cathode at the specified current density?

Question 3 3. What is a circuit diagram (or electrical schematic diagram)?

Question 4 4. Which of the following symbols represents a battery?

Question 5 5. What units are used to describe electric potential difference?

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Question 6 6. How much work is required to move a particle with a 3 C charge from a location in an electric field to that has a 10 V potential to a location that has a 9 V potential?

Question 7 7. According to Ohm's law, increasing the voltage _____

Question 8 8. If you apply a voltage of 20 volts across a resistor of 10 ohms, the current flowing through the resistor is _____.

Question 9 9. This is the unit of measure for electrical current:

Question 10 10. This is the type of current we use now:

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Question 11 11. The unit of electrical power is the:

Question 12 12. One watt is equal to:

Question 13 13. A pacemaker is a device implanted beneath the collar bone that provides shocks to the heart to keep it beating properly. How many electrons are transmitted to a heart if the pacemaker provides 1 milliamp (0.001 amp) of current over 0.1 second?

Question 14 14. How much charge passes a certain point in 10 seconds if the current is 10 amps?

Question 15 15. What is an electric circuit?

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Question 16 16. Which of the following devices is used to measure the current in a circuit?

Question 17 17. The arrow in the diode schematic symbol denotes the _____.

Question 18 18. _____ 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 19 19. Resistivity is:

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

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Question 21 21. A 24-watt automobile headlight is powered by the car's 12V system. What is the internal resistance of the bulb (in ohms)?

Question 22 22. 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?

Question 23 23. The transfer of electrical energy through a conductor:

Question 24 24. Current is:

Question 25 25. What is the apparatus used to measure electric charge and standardize the ampere unit?

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Question 26 26. Which of the following symbols represents a bulb?

Question 27 27. What is the potential difference between two locations if their individual potentials are 4.5 V and 2.3 V?

Question 28 28. For a fixed voltage input, increasing the resistance

Question 29 29. Which statement is true of electricity?

Question 30 30. When given the current and resistance, power can be calculated by:

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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