Chapter 2 Quiz

  1. Name three good electrical conductors.
    A. Gold, silver, wood.
    B. Gold, silver, aluminum.
    C. Copper, aluminum, paper.
    D. Copper, gold, mica.

  2. Name four good electrical insulators.
    A. Plastic, wood, rubber, carbon.
    B. Paper, glass, air, aluminum.
    C. Glass, air, plastic, porcelain.
    D. Glass, wood, copper, porcelain.

  3. Why do resistors sometimes get hot when in use?
    A. Their reactance makes them heat up.
    B. Hotter circuit components nearby heat them up.
    C. They absorb magnetic energy which make them hot.
    D. Some electrical energy passing through them is lost as heat.

  4. What is the best conductor among the following material?
    A. Carbon.
    B. Silicon.
    C. Aluminum.
    D. Copper.

  5. The material listed, which will most readily allow an electric current to flow, is called:
    A. a conductor.
    B. an insulator.
    C. a resistor.
    D. a dielectric.

  6. A length of metal is connected in a circuit and is found to conduct electricity very well. It would be best described as having a:
    A. high resistance.
    B. high wattage.
    C. low wattage.
    D. low resistance.

  7. The letter "R" is the symbol for:
    A. impedance.
    B. resistance.
    C. reluctance
    D. reactance.

  8. The reciprocal of resistance is:
    A. conductance.
    B. reactance.
    C. reluctance.
    D. permeability.

  9. Voltage drop means:
    A. voltage developed across the terminals of a component.
    B. any point in a radio circuit that has zero voltage.
    C. difference in voltage at the output terminals of a transformer.
    D. the voltage that is dissipated before useful work is accomplished.

  10. The resistance of a conductor changes with:
    A. voltage.
    B. temperature.
    C. current.
    D. humidity.

  11. The most common material used to make a resistor is:
    A. carbon.
    B. gold.
    C. mica.
    D. lead.

  12. What do the first three bands on a resistor indicate?
    A. The resistance material.
    B. The power rating in watts.
    C. The value of the resistor in ohms.
    D. The resistance tolerance in percent.

  13. How do you find a resistor's tolerance rating?
    A. By using Thevenin's theorem for resistors.
    B. By reading the resistor's color code.
    C. By reading the Baudot code.
    D. By using a voltmeter.

  14. What does the fourth color band on a resistor mean?
    A. The value of the resistor in ohms.
    B. The power rating in watts.
    C. The resistance material.
    D. The resistance tolerance in percent.

  15. What are the possible values of a 100 ohm resistor with a 10% tolerance?
    A. 90 to 110 ohms.
    B. 90 to 100 ohms.
    C. 10 to 100 ohms.
    D. 80 to 120 ohms.

  16. How do you find a resistor's value?
    A. By using the resistor's color code.
    B. By using a voltmeter.
    C. By using Thevenin's theorem for resistors.
    D. By using the Baudot code.

  17. Which tolerance would a high quality resistor have?
    A. 5%.
    B. 10%.
    C. 20%.
    D. 0.1%.

  18. What tolerance rating would a low quality resistor have?
    A. 20%.
    B. 0.1 %.
    C. 5%.
    D. 10%.

  19. If a carbon resistor's temperature is increased, what will happen to the resistance?
    A. It will stay the same.
    B. It will change depending on the resistor's temperature coefficient rating.
    C. It will become time dependent.
    D. It will increase by 20% for every 10 degrees centigrade.

  20. A gold band on a resistor indicates the tolerance is:
    A. 20%.
    B. 10%.
    C. 5%.
    D. 1%.

  21. A resistor with a color code of brown, black, and red, would have a value of:
    A. 1000 ohms.
    B. 100 ohms.
    C. 10 ohms.
    D. 10 000 ohms.

  22. A resistor is marked with the colors red, violet and yellow. This resistor has a value of:
    A. 274.
    B. 72k.
    C. 27M.
    D. 270k.

  23. Which component has a positive and negative side?
    A. A potentiometer.
    B. A fuse.
    C. A resistor.
    D. A battery.

  24. Which of the following is a source of EMF?
    A. Germanium diode.
    B. Lead acid battery.
    C. P channel FET.
    D. Carbon resistor.

  25. An important difference between a flashlight battery and a lead acid battery is that only the lead acid battery:
    A. has two terminals.
    B. can be repeatedly recharged.
    C. can be completely discharged.
    D. contains an electrolyte.

  26. How much voltage does a standard automobile battery usually supply?
    A. About 240 volts.
    B. About 120 volts.
    C. About 12 volts.
    D. About 9 volts.

  27. A cell, that can be repeatedly recharged by supplying it with electrical energy, is known as a:
    A. low leakage cell.
    B. memory cell.
    C. storage cell.
    D. primary cell.

  28. A dry cell has a nominal voltage of 1.5 volts. When supplying a great deal of current, the voltage may drop to 1.2 volts. This is due to the cell's:
    A. electrolyte becoming dry.
    B. internal resistance.
    C. current capacity.
    D. voltage capacity.

  29. The most common primary cell is use today is the carbon-zinc or flashlight cell. This cell can be recharged:
    A. never.
    B. twice.
    C. many times.
    D. once.

  30. All storage batteries have discharge limits, and nickel-cadmium, the type most used in hand-held portables, should not be discharged to less than:
    A. 0.5 volt per cell.
    B. 1.5 volt per cell.
    C. 0.2 volt per cell
    D. 1.0 volt per cell.

  31. To increase the current capacity of a cell, several cells should be connected in:
    A. parallel.
    B. series.
    C. parallel resonance.
    D. series resonance.

  32. To increase the voltage output, several cells are connected in:
    A. parallel.
    B. series-parallel.
    C. resonance.
    D. series.

  33. A nickel-cadmium battery should never be:
    A. short-circuited.
    B. recharged.
    C. left disconnected.
    D. left over night at room temperature.

  34. If an ammeter is marked in amperes is used to measure a 3000 milliampere current, what reading would it show?
    A. 3 amperes.
    B. 0.003 ampere.
    C. 0.3 ampere.
    D. 3,000,000 amperes.

  35. If a voltmeter marked in volts is used to measure a 3500 millivolt potential, what reading would it show?
    A. 3.5 volts.
    B. 0.35 volt.
    C. 35 volts.
    D. 350 volts.

  36. A kilohm is:
    A. 0.1 ohm.
    B. 0.001 ohm.
    C. 10 ohms.
    D. 1000 ohms.

  37. 6.6 kilovolts is equal to:
    A. 6600 volts.
    B. 660 volts.
    C. 66 volts.
    D. 66,000 volts.

  38. A current of one quarter ampere may be written as:
    A. 0.5 amperes.
    B. 0.25 milliampere.
    C. 250 microampere.
    D. 250 milliamperes.

  39. How many millivolts are equivalent to two volts?
    A. 0.000002.
    B. 2,000
    C. 2,000,000
    D. 0.002.