For the amplifier, when the load is open,the output voltage is 4V, and when the 3k ohm load resistor is connected, the output voltage is 3V, then the output resistance of the amplification circuit is ( )k ohm
发布时间：2024-06-12 21:34:56
请在 下方输入 要搜索的题目：
推荐参考答案 (
由 搜题小帮手 官方老师解答 )
答案：
以下文字与答案无关
提示：有些试题内容 显示不完整,文字错误 或者 答案显示错误等问题，这是由于我们在扫描录入过程中 机器识别错误导致,人工逐条矫正总有遗漏，所以恳请 广大网友理解。
相关试题
- 1.When the input voltage UI and load current IL change, the output voltage of the voltage stabilizing circuit is absolutely unchanged. ()
- 2. A circuit has an applied voltage of 30 volts andA load consisting of a 10-ohm resistor in series with a20-ohm resistor. What is the voltage drop across the10-ohm resistor? 选项： A: 10 volts. B:20 volts. C:30 volts.
- 3.There is a signal generator with a nominal output impedance of 600Ω. The output voltage without load is 2 volts. If connect a load resistor of 1000Ω to the generator, what is the voltage across the 1000Ω resistor? 选项： A、2.5V B、1.0V C、1.25V D、0.5V
- 4.In this experiment, when testing the output characteristics of voltage-adjustable signal source, a fixed resistor is added to the bleeder circuit. According to the circuit’s needs, this resistor can be omitted in general. 选项： A:正确; B:错误
- 5.Regarding Ohm's law 选项： A:the current in a circuit is directly proportional to the resistance of the circuit. B:the power in the circuit is inversely proportional to the square of the current. C:the current in a circuit is directly proportional to voltage. D:the current in a circuit is inversely proportional to voltage.
- 6.The output pulse width of a nonretriggerable one-shot depends on ( ). 选项： A:The trigger intervals B:the supply voltage C:A resistor and capacitor D:the threshold voltage
- 7.What does it usually mean when we say the load increases?选项： A:power; B:voltage; C:current; D:resistance
- 8.When a 10Ω load is connected in the low voltage side (10 kV), the impedance referred to the high voltage side (35kV) is () Ω. 选项： A、100 B、125 C、122.5 D、150
- 9.An op-amp integrator circuit has a 2 MΩ input resistor and a 5 μF feedback loop capacitor. If the inverting input voltage is 2 VDC, the final value of the output voltage is （ ）.选项： A:-20 V B:-2 V C:-0.2 V D:0.02 V
- 10.{One ohm is defined as the amount of resistance in a circuit so that when one volt is applied to the circuit, one ampere of current will flow.}A．ampereB．trueC．falseD．omega
- 11.Ohm’s Law states that the voltage across a resistor is ______ the current flowing through the resistor. 选项： A: equal to B: directly proportional to C: inversely proportional to D: different from
- 12.Which of the following feedback can reduce the output resistance? () 选项： A、Voltage - parallel negative feedback B、Voltage - series negative feedback C、Current - parallel negative feedback D、Current - series negative feedback
- 13.Three-phase asynchronous motor. Given the rated voltage is 380V, Y connected.Can star－delta reducing voltage method be used to start the motor. ( )选项： A:No,it can not be used.; B: It can be used when the load torque is less than the starting torque TSY ; C:Yes, it can be used. ; D:It can be used when the load torque is greater than the starting torque TSY
- 14.For practical purposes, in a simple series circuit, the source voltage will be dropped across one resistor if it has ____. 选项： A: half the resistance of the other resistor B: a resistance equal to the other C: at least ten times the resistance of the other D: a partial short circuit
- 15.For practical purpose ,in a simple series circuit ,the source voltage will be dropped across one resistor if it has______ 选项： A: half the resistance of the other resistor B: a resistance equal to the other C: at least ten times the resistance of the other D: a partial short circuit
- 16.In a simple series circuit, the entire source voltage will drop across () 选项： A: the resistor next to the negative terminal B: a short circuit C: the resistor next to the positive terminal D: an open circuit
- 17.For practical purpose ,in a simple series circuit ,the source voltage will be dropped across one resistor if it has______ 选项： A: half the resistance of the other resistor B: a resistance equal to the other C: at least ten times the resistance of the other D: a partial short circuit
- 18.When a battery is almost fully discharged there is a tendency for the 选项： A:current produced to increase due to the reduced voltage. B:voltage to increase due to the current available. C:electrolyte to boil. D:voltage to decrease under load.
- 19.When the voltage remains constant and the resistance is increased in a series circuit, the current() 选项： A: increases or decreases B:increases C: remains the same D:decreases
- 20.The common mode rejection ratio of differential amplifier means( ) 选项： A:Ability to reject zero drift; B:Driving load capacity; C:The value of differential mode voltage gain; D:The value of common mode voltage gain
- 21.When population increases, _____. 选项： A、industrial output also does B、as industrial output does C、industrial output does to D、so does industrial output
