Please also explain briefly. Which of the following controls the level of I_G? A

Question

Please also explain briefly.

Which of the following controls the level of I_G? A. V_GS b. V_DS c. I_G d. V_DG Which of the following transistor(s) has (have) depletion and enhancement types? a. BJT b. JFET c. MOSFET d. None of the above A BJT is a ___controlled device. The JFET is a____ controlled device. a. voltage, voltage b. voltage, current c. current, voltage d. current, current The BJT is a ___device. The FET is a ___device. a. bipolar, bipolar b. bipolar, unipolar c. unipolar, bipolar d. unipolar, unipolar Which of the following is (are) the terminal(s) of a field-effect transistor (FET) a. Drain b. Gate c. Source d. All of the above What is the level of I_G in an FET? a. Zero amperes b. Equal to I_D c. Depends on V_DS d. Undefined How many terminals can a MOSFET have? a. 2 b. 3 c. 4 d. 3 or 4

Explanation / Answer

1.The input voltage VGS controls the drain current ID in FET device because FET is a voltage control device .

2.The MOSFET is classified into two types such as Depletion mode MOSFET and Enhancement mode MOSFET

3.i.BJT is a current control device because input base current IB controls the the output collector current IC

ii.FET or JFET is a voltage control device becuase the input voltage VGS controls the drain current ID

4.i.BJT is a bipolar device becuase current flows due to both majority and minority carriers

ii..FET is a unipolar device becuase current flows due to only majority carriers.

5.FET is a three terminal device it has three terminals drain,source and Gate.

6.The level of IG is zero amperes in FET becuase to achieve high input impedance

7.The MOSFET is a four terminal device,it has source,gate,drain and body terminal. The body terminal of the MOSFET is frequently connected to the source terminal so MOSFET is also three terminal device like FET

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