Basic electrical engineering
Previous year question paper with solutions for Basic electrical engineering May-2017
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Question paper 1
SECTION A
Q1. Fill in the blanks:
a. Ohms law will hold good if the __________ remain constant.
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b. If 125V is applied across a 250V, 100w bulb, the power consumption will be ______.
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c. Kirchhoff’ s current law (KCL) is applicable to___________.
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d. An ideal current source has ___________ internal resistance.
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e. The unit of self inductance is____________.
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f. For battery charging ___________ supply is required.
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g. Peak factor is defined as the ratio of ________ and________.
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h. The power consumed in pure capacitive circuit is___________.
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i. To improve p.f. of a circuit, a capacitor is connected in_________ to the load.
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j. Sun is a ____________ source of energy.
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SECTION B
Q2: Attempt any five questions.
i. State and explain Kirchhoff’ s current law.
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ii. State and explain Thevenin, s theorem with help of neat diagram.
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iii. What is constant current source and draw characteristics of an ideal current source.
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iv. State and explain Faraday’ s laws of electromagnetic induction?
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v. Discuss about primary and secondary cells?
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vi. Compare A.C. and D.C.
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vii. What are the causes and disadvantages of poor power factor?
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viii. Mention six important advantages of electrical energy.
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SECTION-C
Attempt any three questions.
Q3. Mention the similarities and dissimilarities of electric and magnetic circuits.
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Q4. What are the various precautions to be observed for obtaining longer life and better efficiency of lead acid battery.
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Q5.Define instantaneous value, maximum value, average value and effective value of an alternating quantity.
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OR
Find the impedance, current and power factor of the following series circuits and draw the corresponding phasor diagram: (i) R and L (ii) R and C In each case the applied voltage is 100 volts, the frequency is 50 Hz, R=40Ω, L=0.1H,C=20µf.
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Q.6.Explain the major components of a nuclear power station and draw there on block diagram.
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