1. In the circuit shown in the figure above, what will happen when switches S 1

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1 Student ID: Exam: RR - Introduction to Electronics When you have completed your exam and reviewed your answers, click Submit Exam. Answers will not be recorded until you hit Submit Exam. If you need to exit before completing the exam, click Cancel Exam. Questions 1 to 20: Select the best answer to each question. Note that a question and its answers may be split across a page break, so be sure that you have seen the entire question and all the answers before choosing an answer. 1. In the circuit shown in the figure above, what will happen when switches S 1 are both closed? A. Nothing will happen; the light bulb won't light up. B. The resistance of the circuit will increase. C. The light bulb will light up. D. Current will flow in the circuit. 2. Which one of the following letters is used as an abbreviation when representing a unit of electric current? A. A B. E C. R D. C 3. A testing instrument that an electronics technician will connect to selected points inside a piece of electronic equipment and measure electrical values such as ohms, volts, and amperes is called a/an A. oscilloscope. B. signal generator. C. power supply. D. multimeter.

4. Which of the following statements about the measurement of electrical quantities is correct? A. Current is measured in units called volts. B. Voltage is measured in units called amperes. C. Resistance is measured in units called ohms.

2 4. Which of the following statements about the measurement of electrical quantities is correct? A. Current is measured in units called volts. B. Voltage is measured in units called amperes. C. Resistance is measured in units called ohms. D. Electrical pressure is measured in units called watts. 5. Which of the following is the first step in a lockout-and-tag procedure? A. Sign your tag and place it on the lock. B. Try to start the machine. C. Shut off the electricity to the machine at the breaker. D. Place your lock on the breaker or switch. 6. At a job interview, the most effective way to prove your proficiency to a prospective employer is to show that you have A. experience with on-line research. B. your own test equipment. C. membership in several professional organizations. D. certification as an electronics technician. 7. An electronics technician who enjoys working "at the bench" would most likely want to work A. as a microwave technician. B. as a central office technician. C. for a manufacturer. D. for a TV or radio station. 8. Safety is a concern around electronic equipment of all types. When you see the sign and the symbol shown in the figure above, what particular safety hazard may exist? A. Radioactivity B. High voltage C. Delicate equipment D. Laser light 9. Which of the following statements about light-emitting diodes is correct? A. Light-emitting diodes have very short life-spans in circuits. B. Light-emitting diodes conduct current in either direction in circuits. C. Light-emitting diodes are used as rectifiers in circuits.

3 D. Light-emitting diodes are used as indicators in circuits. 10. Look at the four schematic symbols shown in the figure above. Each of the symbols is labeled with a number. Which of the following statements about these symbols is correct? A. Symbol 1 represents a transistor, symbol 2 represents a resistor, symbol 3 represents an LED, and symbol 4 represents a diode. B. Symbol 1 represents a diode, symbol 2 represents an LED, symbol 3 represents a transistor, and symbol 4 represents a resistor. C. Symbol 1 represents a transistor, symbol 2 represents a diode, symbol 3 represents a resistor, and symbol 4 represents an LED. D. Symbol 1 represents a diode, symbol 2 represents a resistor, symbol 3 represents an LED, and symbol 4 represents a transistor. 11. Look at the simple circuit illustrated in the figure above. What will happen when only switch S 1 is closed? A. Nothing will happen; the light bulb won't light up. B. No current will flow in the circuit. C. The light bulb will light up. D. The resistance of the circuit will increase.

12. Which of the following information sources was not directly affected by the Telecommunications Act of 1996? A. The Internet B. Cable television C. Newspaper publishing D. Telephone services 13.

4 12. Which of the following information sources was not directly affected by the Telecommunications Act of 1996? A. The Internet B. Cable television C. Newspaper publishing D. Telephone services 13. In the circuit shown in the figure above, which switches must be closed in order for the light bulb to light up? A. Only switches S 1 need to be closed for the light bulb to light up. B. Only switches S 2 need to be closed for the light bulb to light up. C. Only switches S 1 and S 2 need to be closed for the light bulb to light up. D. Only switch S 1 needs to be closed for the light bulb to light up.

5 14. You're working at a large industrial plant and notice a tag similar to the one shown in the figure above. Which of the following actions should you take? A. Operate this switch only after getting permission from the person who signed the tag. B. Operate this switch only after normal working hours. C. Operate this switch only after making certain no one is working on the affected circuit. D. Operate this switch only if more than 24 hours have elapsed since the tag was signed. 15. Porcelain, paper, glass, and rubber are all examples of electrical A. conductors. B. batteries. C. insulators. D. grounds. 16. When electric current is flowing in a circuit, if the voltage applied to the circuit is increased, the A. resistance will increase. B. resistance will decrease. C. current will decrease. D. current will increase. 17. On a printed circuit board, electronic components will be mounted from the A. substrate side of the board. B. foil side of the board. C. side of the board that contains the conducting paths. D. side of the board that's covered with copper sheeting. 18. Which of the following is a correct definition of the term rectification? A. Rectification is the conversion of AC current to DC current. B. Rectification refers to the connection of components into a circuit. C. Rectification involves sensing an electrical quantity and converting it to a signal. D. Rectification is the opposition to current flow in a circuit.

6 19. In the circuit shown in the figure above, what will happen when switches S 2 are both closed? A. Nothing will happen; the light bulb won't light up. B. The resistance of the circuit will increase. C. Current will flow in the circuit. D. The light bulb will light up. 20. A testing instrument that's used to measure electrical signals in a circuit and display them as waveforms on a screen is called a/an A. power supply. B. signal generator. C. oscilloscope. D. multimeter. End of exam

Chapter 12 Electric Circuits

Conceptual Physics/ PEP Name: Date: Chapter 12 Electric Circuits Section Review 12.1 1. List one way electric current is similar to water current and one way it is different. 2. Draw a circuit diagram