Which parameter is not measured by DPO-2002B double-channel oscilloscope?
A: current
B: voltage
C: cycle time
D: frequency
A: current
B: voltage
C: cycle time
D: frequency
举一反三
- Which of these is not an electrical quantity（） A: time B: voltage C: current D: power
- ( ) is not the index of power quality. A: voltage B: current C: frequency D: waveform
- The effective value of ac voltage or current is（ ） A: The average value of a voltage or current B: DC equal to the AC thermal effect is defined as the effective value of AC C: voltage or current are 0.707 of their amplitudes D: closely related to the frequency of alternating current
- Digital multi-meter cannot measure ( ) when the measured circuit is working. A: voltage B: current C: resistance D: None of the above
- It can be measured by HF9600E Multi-Function Power Meter（ ） A: Current RMS B: voltage RMS C: instantaneous power D: active power