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S.B. Roll NO. _______________

BASIC ELECTRIC ENGG. 2nd Exam/ECE/2561/0064/6125/6123/Nov’14 Duration 3 hrs.

Q1. a) b) c) d) e) f) g) h) i) j)

M.Marks:75

SECTION – A Fill in the Blanks. All the electrical equipments are connected in _______to the supply. Tesla is a unit of _______. A practical current source has _______ internal resistance. Commercial unit of electrical energy is _______. The resistance of 100W, 250 V, incandescent lamp is _______. The power drawn by pure inductance is _______. The power station located at Bhakra is _______ Power station. The unit of coefficient of coupling is _______. Frequency of DC voltage is _______. If Vth = 10 V, Rth = 2 Ohms and Rl = 3 ohms, the current through Rl is _______ .

(15)

SECTION – B Q2. 1) 2) 3) 4) 6) 7)

Attempt any five questions. State Kirchoff’s current law with example. State and Explain Faraday’s laws of electromagnetic induction. Define Self and Mutual induced emf’s. Define MMF, Flux, Reluctance and Permeability. Give a general idea of solar cell. Discuss the concept of constant voltage source.

SECTION – C Note : Attempt any three questions. Q3. State and explain Norton’s theorem with an example.

(5 x 6 = 30)

(3 x 10 = 30)

Q4.

Explain the major necessity of Nuclear power generation and discuss the block diagram of a Nuclear station..

Q5.

What are the various precautions to be observed for obtaining longer life and better efficiency of lead acid battery.

Q6

Define power factor. What are the disadvantages of low power factor .

Q7.

Write short note on the following : a) Primary and secondary Cells b) Analogy between Electric & Magnetic circuits

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