Download SGBAU B-Tech 1st Sem Chemical Engineering Electrical Enginerring I Question Paper

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B.E./ B.Tech. (Chemical Engineering) / B.Text. First Semester (Old Course)
Electrical Engineering—1:1S6

Notes :

1. All questions carry equal marks.
2. Due credit will be given to neatness and adequate dimensions.

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3. Assume suitable data wherever necessary.
4. Use of pen Blue/Black ink/refill only for writing the answer book.

Calculate the value of resistance r, when total current supplied by the 20V, battery is 1.5A for the network shown in fig.

r

100 150Ω

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1.5A

20V

Explain Kirchoff's current and voltage law.
OR
Derive the expression for star to delta transformation.

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Apply Thevenin's theorem and find current flowing through 4Ω resistance.

15V

Compare electrical and magnetic circuit by their similarities and dissimilarities.

An air core solenoid having a diameter of 4cm and length 60cm wound with 400 turns if a current 5A. Calculate
i) inductance. ii) Energy stored in magnetic circuit.

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OR
Derive an expression for mutual inductance.

An Iron ring of 25cm in diameter and 10cm² cross section area is wound with 250 turns of wire for flux density 1 wb/m² and permeability 800, find
i) Exciting current ii) Self inductance
iii) Corresponding when there is 1mm airgap cut in the ring.

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Explain construction and working principle of PMMC instrument.

What do you mean by earthing. Explain importance of earthing.

OR
With the help of suitable diagram explain the energy meter.

Explain :

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AW - 3537

Time : Two Hours Max. Marks : 40

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