? GTU Engineering 1st Year MCQ | Elements of Electrical Engineering-2110005 Winter 2015 Sem-1

MCQ(s) of Elements of Electrical Engineering (2110005) - Winter 2015 Sem-1

    • Q. 1  Which of the following material has nearly zero temperature co-efficient of resistance ?
    • (A) Carbon
      (B) copper
    • (C) porcelain
      (D) manganin
    • (D) manganin
    • Q. 2  The unit of absolute permittivity of a medium is
    • (A) farad/coulomb
      (B) newton-m
    • (C) farad/m
      (D) joule/coulomb
    • (C) farad/m
    • Q. 3  The unit of resistivity is
    • (A) Ohm / m
      (B) Ohm-m
    • (C) mho/m
      (D) mho-m
    • (B) Ohm-m
    • Q. 4  Time constant of an R-C ckt. may be defined as
    • (A) time during which capacitor voltage rises to 0.632 of its initial value
      (B) time during which charging current falls to 0.37 of its initial max. value
    • (C) time during which capacitor voltage falls to 0.632 of its final steady value
      (D) time during which charging current rises to 0.37 of its initial max. value
    • (B) time during which charging current falls to 0.37 of its initial max. value
    • Q. 5  The unit of reluctance is
    • (A) AT / Wb
      (B) Wb / AT
    • (C) 1/Henry
      (D) either [b] or [c]
    • (A) AT / Wb
    • Q. 6  Wh efficiency of lead-acid cell is __________ Ah efficiency.
    • (A) greater than
      (B) smaller than
    • (C) equal to
      (D) none of this
    • (B) smaller than
    • Q. 7  The value of form factor is
    • (A) 11.1
      (B) 1.11
    • (C) 1.414
      (D) 14.14
    • (B) 1.11
    • Q. 8  The value of power factor is zero for
    • (A) purely inductive ckt
      (B) purely resistive ckt
    • (C) purely capacitive ckt
      (D) either [a] or [c]
    • (D) either [a] or [c]
    • Q. 9  For a series resonance condition of AC circuit impedance is
    • (A) minimum
      (B) maximum
    • (C) zero
      (D) infinity
    • (A) minimum
    • Q. 10  The filament used in incandescent lamp is made of
    • (A) copper
      (B) alluminium
    • (C) nichrome
      (D) tongston
    • (D) tongston
    • Q. 11  The value of crest factor is
    • (A) 11.1
      (B) 1.11
    • (C) 1.414
      (D) 14.14
    • (C) 1.414
    • Q. 12  For a parallel resonance condition of a AC circuit current is
    • (A) minimum
      (B) maximum
    • (C) zero
      (D) infinity
    • (A) minimum
    • Q. 13  For unity power factor load of 3-phase ckt.,if we measure the power by 2-wattmeter method then readings of wattmeters are
    • (A) one wattmeter shows zero reading
      (B) equal & +ve sign
    • (C) equal & opposite sign
      (D) both shows zero reading
    • (B) equal & +ve sign
    • Q. 14  The power factor of R-C series Ac ckt. is
    • (A) unity
      (B) lagging
    • (C) leading
      (D) zero
    • (C) leading