Identify the feed back type. ( ).[img=682x460]1803c60dfb191b0.jpg[/img]
A: Series Voltage Negative
B: Series Current Negative
C: ParallelVoltageNegative
D: ParallelCurrentNegative
A: Series Voltage Negative
B: Series Current Negative
C: ParallelVoltageNegative
D: ParallelCurrentNegative
举一反三
- 如果定义函数计算调和级数之和;series::Int-Float用series n表示[img=242x25]1803c461290438b.png[/img]，那么如何用series 表示[img=191x25]1803c46130ff710.png[/img]？ A: series n-1 B: series (n-1) C: series 1 + series 2 + ... + series (n-1) D: series (1+1/2+..+ 1/n-1)
- Whenever you see or hear something new, you go through a series of ___________ processes, which are the processes that result in learning. A: positive B: sciential C: negative D: cognitive
- 在电阻串联电路中，如果某一个电阻开路，则（ ）In a series resistive circuit, if a resistance is open, ( ) A: 总电流为0 the total current is 0 B: 总电阻为∞，the total resistance is ∞ C: 开路处的电压等于电源电压the opened-resistor voltage is equal to the supply voltage D: 开路处的电压等于0 the opened-resistor voltage is equal to 0
- The time series is mainly divided into absolute number time series, relative number time series and ( ). A: Period series B: Time-point series C: Chronological series D: Average time series
- If the current direction of each mesh is the same, the mutual resistance of each mesh equation ( ). A: is always negative B: is always positive C: is always zero D: can be positive or negative