Higher AC quiz

1. The trace below was obtained from an oscilloscope with y gain set to 2 V/division and time-base to 10 ms/division. Determine the period.

• 0.8 ms
• 1.7 ms
• 8 ms
• 17 ms
• 40 ms

2. The trace below was obtained from an oscilloscope with y gain set to 2 V/division and and time-base to 10 ms/division. Determine the peak voltage.

• 1.9 V
• 3.8 V
• 4.0 V
• 7.6 V
• 8.0 V

3. The trace below was obtained from an oscilloscope with y gain set to 2 V/division and and time-base to 10 ms/division. Determine the RMS voltage.

• 3.8 V
• 5.4 V
• 7.6 V
• 10.7
• 15.2 V

4. The trace below was obtained from an oscilloscope with y gain set to 0.5 V/cm with y axis shown in cm. The time-base shows milliseconds on the scale. Determine the peak voltage.

• 1.1 V
• 1.2 V
• 5.0 V
• 6.0 V
• 12.0 V

5. The trace below was obtained from an oscilloscope with y gain set to 0.5 V/cm with y axis shown in cm. The time-base shows milliseconds on the scale. Determine the RMS voltage.

• 3.0 V
• 4.2 V
• 6.0 V
• 8.5 V
• 12.0 V

6. The trace below was obtained from an oscilloscope with y gain set to 0.5 V/cm with y axis shown in cm. The time-base shows milliseconds on the scale. Determine the frequency

• 0.2 Hz
• 5 Hz
• 10 Hz
• 5000 Hz
• 10000 Hz

7. An alternating voltage single is displayed on an oscilloscope with the setting shown. Which row shows the peak voltage an frequency of the signal?

• Vp = 10 V, f = 100 Hz
• Vp = 10 V, f = 250 Hz
• Vp = 20 V, f = 250 Hz
• Vp = 10 V, f = 500 Hz
• Vp = 20 V, f = 1000 Hz

7. The heating element in a boiler operates at 2400 W from a 120 V rms power supply. What is the rms current in this element?

• 10.0 A
• 14.1 A
• 20.0 A
• 28.3 A
• 40.0 A