Which of the following electrical devices do you like the most? Resistor Diode M

Question

Which of the following electrical devices do you like the most? Resistor Diode MOSFET BJT None of them What is the gain of the following transresistance amplifier? 10V/V 1000V/V -10 ohm 10000 ohm What is the input resistance of the following amplifier? 4k ohm 200 ohm 1mA infinity ohm What is the amount of current flowing out of the op-amp in the following circuit when V_1 is 1V? Assume the op-amp is ideal. 5mA -50 mu A 0A -5V Consider an NMOS transistor with V_G = 5V, V_S = 2V, V_D = 3V, and V_t = 0.8V. In which of operation is the transistor? Triode Saturation Cutoff Active

Explanation / Answer

1. Resistor is the electrical device remaining are belongs to electronics

2. Transresistance =10/(1×10^-3)=10000 ohms.

3. Input resistance=4/(1×10^-3)= 4K ohms

4. Voltage at the positive terminal=0 volts because V(-ve)=0.

I=(1-0)/(20×1000)=50×10^-6 amps.This current has to flow through feedkback resistor(outside of op amp).

5. Vgs=Vg-Vs=5-2=3volt

Vds=Vd-Vs=3-2=1volt

Vgs-Vt=3-0.8=2.2>Vds=1.

therefore, the NMOS transistor works in triode region.

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