EC6202 Electronic Devices and Circuits, Second year, Department of Robotics & Automation Engineering, first and second Units Questions.

EC6202 Electronic Devices and Circuits, Second year, Department of Robotics & Automation Engineering, first and second Units Questions.

PART –A (10 ×02 = 10 Marks)

1.      Define Diode-Resistance.

2.      What is Transition capacitance and Diffusion capacitance?

3.      Mention the applications of diode.

4.      What is rectifier and list its types?

5.      What is meant by biasing?

6.      Compare BJT and FET.

7.      Draw the transfer and drain characteristics of JFET.

8.      Difference between JFET and MOSFET.

9.      What are the two methods of turning a SCR ON?

10.  Define Pinch off voltage.

PART –B (5×13=65 Marks)

1.      With neat sketch explain the construction, operation and its characteristics of PN junction diode. Also list its advantages, disadvantages and its applications.

2.      Explain the working of Bridge rectifier. Give the expressions for RMS current, PIV, Ripple factor and efficiency.

3.      Explain the construction and operation of NPN transistor with neat sketch. Also comment on the characteristics of NPN transistor.

4.      With neat sketch, explain the construction, operation and characteristics of SCR.

5.      Elaborately discuss the structure and characteristics of the IGBT.

PART – C (1x15=15)

1.      Briefly discuss about following

a)      Temperature effect of PN junction

b)      Laser Diode

c)      LED