Electronic Devices Test-2 (JFET,SCR,LED,SSD,LDR&PhotoDiode)

Name of the Student

Roll Number of the Student

The BJT is a ________ device. The FET is a ________ device.

• bipolar, bipolar

• bipolar, unipolar

• unipolar, bipolar

• unipolar, unipolar

A field effect transistor operates on

• Majority carriers only
• Minority carriers only
• Positively charged ions only
• Negatively charged ions only

What is the level of drain current ID for gate-to-source voltages VGS less than (more negative than) the pinch-off level?

• zero amperes
• IDSS
• Negative value
• Undefined

What is the ratio of ID / IDSS for VGS = 0.5 VP?

• 0.25
• 0.5
• 1
• 0

Which of the following represent(s) the cutoff region for an FET?

• ID = 0 A
• ID = IDSS
• ID = IDSS/2
• ID = IDSS/4

Which of the following controls the level of ID?

• VGS
• VDS
• IG
• VDG

Referring to the following transfer curve, determine the level of VGS when the drain current is 10 mA.

• 0 V
• –1.66 V
• 0.66 V
• –0.66 V

With a JFET, a ratio of output current change against an input voltage change is called

• Transconductance
• Impedance
• Resistivity
• Gain