Title: AC and Series/Parallel Test
Course: Electrical Theory (IC 101-IC 101) > Section: Assessments

Q: 120 volts AC available from an electrical outlet means 120 volts RMS.
- True
- False
A: True

Q: 360° corresponds to π radians.
- True
- False
A: False

Q: A sine wave of 250K Hz has a period of 4μ seconds.
- True
- False
A: True

Q: A sine wave with a frequency of 12K Hz is changing at a faster rate than a sine wave with a frequency of
- 20K Hz
- 15,000 Hz
- 10,000 Hz
- 1.25M Hz
A: 20K Hz

Q: During each cycle, a sine wave reaches a peak value
- one time
- two times
- four times
- a number of times depending on the frequency
A: one time

Q: Frequency = the number of cycles per second.
- True
- False
A: True

Q: If the peak value of a sine wave is 10V, the peak-to-peak value is
- 20V
- 5V
- 100V
A: 20V

Q: If the peak value of a sine wave is 20V, the RMS value is
- 14.14V
- 6.37V
- 7.07V
- 0.707V
A: 14.14V

Q: Maximum voltage in a sine wave occurs at an angle of 45°.
- True
- False
A: False

Q: One half cycle of a sine wave would correspond to 180°.
- True
- False
A: True

Q: The amount of time required for one cycle is called wavelength.
- True
- False
A: False

Q: The average value of a 10V peak sine wave over one complete cycle is
- 0V
- 6.37V
- 7.07V
- 5V
A: 0V

Q: The instantaneous value of a 15V peak sine wave at a point 32° from its positive-going zero crossing is
- 7.95V
- 7.5V
- 2.13V
- 7.95A
A: 7.95V

Q: The output voltage of a balanced Wheatstone bridge is
- equal to the source voltage
- equal to zero
- dependent on all of the resistor values in the bridge
- dependent on the value of the unknown resistor
A: equal to the source voltage

Q: The peak value is equal to the RMS value divided by .707.
- True
- False
A: True

Q: The RMS and Average value of a sine wave are the same.
- True
- False
A: False

Q: To convert peak-to-peak to RMS, divide the peak-to-peak voltage by 2.828.
- True
- False
A: True

Q: Two 1.0KΩ resistors are in series and this series combination is in parallel with a 2.2KΩ resistor. The voltage across one of the 1.0KΩ  resistors is 6V. The voltage across the 2.2KΩ resistor is
- 6V
- 3V
- 12V
- 13.2V
A: 6V

Q: Two series resistors are connected to an AC source. If there is 6.5V rms across one resistor and 3.2V rms across the other, the peak source voltage is
- 9.7V
- 9.19V
- 13.72V
- 4.53V
A: 9.7V

Q: When measuring DC voltage, a DMM will normally have a small loading effect on a circuit.
- True
- False
A: True

Q: What is the average value?
A: 12.74V

Q: What is the frequency?
A: 100M Hz

Q: What is the P-P (peak-to-peak) value?
A: 40V

Q: What is the RMS value?
A: 14.14V

Q: What is the voltage at 30°?
A: 10V

Q: I_1=
A: 20mA

Q: I_2=
A: 8mA

Q: I_3=
A: 12mA

Q: R_T =
A: 10K ohms

Q: I_2=
A: 30mA

Q: R_3=
A: 23.5K Ohms

Q: V_2=
A: 470V

Q: I_3=
A: 200mA

Q: V_8=
A: 40V

Q: Symptom: The ammeter reading is 1mA, and the voltmeter reading is 0V.
- There is a short across R1.
- There is a short across R2.
- R3 is open.
A: There is a short across R1.

Q: Symptom: The ammeter reading is near zero, and the voltmeter reading is 12V.
- R1 is open.
- R2 is open.
- Both R2 and R3 are open.
- R1 is shorted
A: R1 is open.

Q: Symptom: The ammeter reading is 444μA, and the voltmeter reading is 6.67V.
- R1 is shorted.
- R2 is open.
- R3 is open.
- R1 is open
A: R1 is shorted.