Set C (CA 2)
BASIC ELECTRICAL AND ELECTRONICS ENGINEERING (ECE 131)
NOTE: Attempt ALL Questions
Max Marks: 30 (Each Question carries 5 Marks)
Name:
Reg. No.:
Date of Test:
Section:
Roll No.:
Believe you can and you are halfway there.
IMPORTANT INSTRUCTIONS:
1. Use A4 sheets ONLY for writing your answers.
2. Maximum number of sheets allowed would be THREE. Anything in excess to that won’t be
checked.
3. Upload the file on UMS within stipulated date in pdf format only.
4. Make sure that you are attempting the set that has been allocated as per your UMS
account.
1. A 3300/230 V and 50 Hz, single phase transformer is to be worked at a maximum flux density of
1.2 Wb/m2 in the core. The effective cross sectional area of the transformer core is 150 cm2.
Calculate:
i.
Maximum flux from the secondary side.
ii.
Turns ratio
iii.
Primary and secondary currents
2. How to measure high alternating currents and high alternating voltages during the transmission
and the distribution of the electricity?
3. Explain how the torque gets developed in the dc motor? Derive its relation.
4.
Explain the working of a full wave bridge rectifier with proper waveforms? What are its
advantages over the center tapped transformer?
5. Simplify the following Boolean expression:
̅̅̅̅̅̅̅̅̅̅̅̅
(𝐴 + ̅̅̅̅̅
𝐵𝐶). (𝐴𝐵̅ + 𝐴𝐵𝐶)
6. Explain the VI characteristics of Common base NPN transistor? Draw all necessary diagrams/