Digital multi-meter cannot measure ( ) when the measured circuit is working.
A: voltage
B: current
C: resistance
D: None of the above
A: voltage
B: current
C: resistance
D: None of the above
举一反三
- The central knob of digital multimeter has several positions. To measure DC/AC voltage,set the multimeter to 1 . To measure rcsistance, set the multimeter to 2 . Tomeasure small current, set the multimeter to 3 . To measure large current, set the multi-meter to 4 ：
- The resistance value is infinite, the current passing through the resistance is always zero, and the voltage depends on the external circuit, then it is called as the short circuit state.
- A transistor is a ( )operated device. A: voltage B: current C: both voltage and current D: none of the above
- When measuring current, circuit power before connecting the meter in the circuit.
- It can be measured by HF9600E Multi-Function Power Meter（ ） A: Current RMS B: voltage RMS C: instantaneous power D: active power