The b value of triode is the parameter reflecting the ability, which is () a voltage control voltage B current control voltage C voltage control current D current control current

The b value of triode is the parameter reflecting the ability, which is () a voltage control voltage B current control voltage C voltage control current D current control current

A channel circuit, a voltmeter and power supply, electrical appliances in parallel, then the voltmeter measured whose voltage?

If other electrical appliances are connected in series, it is the voltage of other electrical appliances, otherwise it is the power supply voltage

A power supply, a light bulb and a voltmeter are connected in series (arranged in any order). The circuit is a path. Does the voltmeter measure the power supply voltage at this time?

Yes, the voltmeter is equivalent to open circuit, the current can not form a loop, so the bulb will not light, that is, there is no current in the bulb, that is, there is no voltage, so the voltmeter measures the power supply voltage

Use a voltmeter to measure the circuit diagram of the power supply. Is the positive pole of the voltmeter connected to the positive pole of the power supply?
Use a voltmeter to measure the circuit diagram of the power supply. Is the positive pole of the voltmeter connected to the positive pole of the power supply and the negative pole connected to the negative pole?

Of course
Which watch do you see is connected reversely