Electronic Principles problems
- 1. What is the smallest number of polarities required for current flow?
Options- A. One - a negative terminal
- B. Two - a negative terminal and a positive terminal
- C. Three - negative, positive and neutral terminals
- D. Four - two negative and two positive
- E. None of the above Discuss
Correct Answer: Two - a negative terminal and a positive terminal
- 2. The value of a capacitor can be made larger by:
Options- A. increasing the area of the plates
- B. decreasing the area of the plates
- C. increasing the frequency of the applied voltage
- D. increasing the voltage applied to the plates
- E. None of the above Discuss
Correct Answer: increasing the area of the plates
- 3. Which one of the following equations most directly determines the power dissipation of a resistance when you know the voltage drop and amount of resistance?
Options- A. P = I2R
- B. P = IE
- C. P = E2/R
- D. I = P/E
- E. None of the above Discuss
Correct Answer: P = E2/R
- 4. Suppose a voltage source has an ideal voltage of 12V and an internal resistance of 0.5W. For what values of load resistance will the voltage source appear stiff?
Options- A. 5 Ohm
- B. 50 Ohm or more
- C. 100 Ohm
- D. 6 Ohm
- E. None of the above Discuss
Correct Answer: 50 Ohm or more
- 5. Which one of the following equations most directly determines the amount of current flowing through a resistor when you know the value of the resistor and the voltage drop across it?
Options- A. E = PR
- B. E = I2R
- C. I = E/R
- D. I = ER
- E. None of the above Discuss
Correct Answer: I = E/R
- 6. Voltage is
Options- A. The flow of charged particles through a material
- B. The smallest electrically charged particle
- C. Trie force that causes electrons to flow
- D. The number of free electrons in an atom
- E. None of the above Discuss
Correct Answer: Trie force that causes electrons to flow
- 7. The north pole of a magnet is the one:
Options- A. that has its molecules arranged in a random pattern
- B. that would be attracted to the earth's north magnetic pole
- C. that would be repelled by the south pole of another magnet
- D. that would be attracted to the earth's south magnetic pole
- E. None of the above Discuss
Correct Answer: that would be attracted to the earth's north magnetic pole
- 8. A resistor has a rated value of 100 ohm and a tolerance of 10%. What is its minimum and maximum allowable resistance value?
Options- A. 90 Ohm - 101 ohm
- B. 90 Ohm - 110 ohm
- C. 98 Ohm - 100.1 ohm
- D. 99 Ohm - 102 ohm
- E. None of the above Discuss
Correct Answer: 90 Ohm - 110 ohm
- 9. What is the turns ratio for the transformer specified in the above question?
Options- A. 10.738
- B. 0.707
- C. 1.5
- D. 0.575
- E. None of the above Discuss
Correct Answer: 0.707
- 10. What is a negative ion?
Options- A. An atom that contains more electrons than neutrons
- B. An atom that contains more protons than neutrons
- C. An atom that contains more electrons than protons
- D. An atom that contains more protons than electrons
- E. None of the above Discuss
Correct Answer: An atom that contains more electrons than protons
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