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12th November 2014, 09:27 AM
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| Re: UPSC EEE Branch Papers
For B. Tech candidates UPSC conduct IES (Indian Engineering Services) Exam for selection of candidates on IES post. Here I am giving you Electrical Engineering’ s previous years Question Papers for UPSC IES Exam. 1) The impedance Z offered by transmission line for a travelling wave which damps out the low frequency oscillation rapidly is also called A) Surge impedance B) Natural impedance C) Both surge and natural impedances D) Neither surge nor natural impedance 2) In a coaxial transmission line, the useful power flows through A) the interface of the two conductors B) both inner and outer conductors C) inner conductor D) outer conductor 3 For a line to have a purely resistive characteristic impedance where R and G are resistance and conductance per unit length respectively and L and C are inductance and capacitance per unit length respectively. A) C/G =R/L B) ωL = 1 /ωC C) R = G D) GL = RC 4) semiconductor device made out of a material having very high temperature coefficient of resistance is A) Transistor B) Varistor C) Thyristor D) Thermistor 5) The electrical conductivity of a semiconductor increases with increase in temperature because A) the carrier concentration increases B) the mobility of carrier increases C) both carrier concentration and mobility increase D) the band gap decreases 6 Which of the following are associated with soft superconductors 1) Silsbee's rule 2) Meissner effect 3) Faraday rotation 4) Curie-Weiss law A) 2,3 and 4 B) 1 and 3 only C) 1 and 2 only D) 2 and 3 only 7) In a two-channel oscilloscope operating in x-y mode, two in-phase 50 Hz sinusoidal waveforms of equal amplitude are fed to the two channels. What will be the resultant pattern on the screen A) An ellipse B) A parabola C) Straight line inclined at 45° with respect to x-axis D) A circle 8) Materials, whose resistivity at very low temperatures plunges from a finite value to zero and remains there upon further cooling, are known as A) Ferromagnetic materials B) High-energy hard magnetic materials C) Superconductors D) Ferrimagnetic materials 9) In a superconductor, if the temperature is decreased below its critical temperature, the value of critical magnetic field will A) increase B) decrease C) Not change D) Increase or decrease depending on the superconductor material 10 The imaginary part of dielectric constant determines A) Component of current which is in phase with the applied field B) Component of energy absorbed per m3 C) Amount of applied field D) Component of voltage which is in phase with the applied field      Some detailed previous years question papers of UPSC EEE branch |
