MCQ(s) of Physics (2110011) - Summer 2016 Sem-2

    • Q. 1  The maximum operating temperature of class Y insulating materials is _________
    • (A) above 18oC
      (B) 155oC
    • (C) 130oC
      (D) 90oC
    • (D) 90oC
    • Q. 2  The unit of absorption coefficient is ___________.
    • (A) W/m2
      (B) dB
    • (C) Sabine
      (D) Bel
    • (C) Sabine
    • Q. 3  ________ materials are used to make permanent magnets.
    • (A) Diamagnetic
      (B) Paramagnetic
    • (C) Soft magnetic
      (D) Hard magnetic
    • (D) Hard magnetic
    • Q. 4  The basic principle behind fiber optic communication is ___________.
    • (A) reflection
      (B) refraction
    • (C) diffraction
      (D) total internal reflection
    • (D) total internal reflection
    • Q. 5  The grain size of nanomaterials is in the range of
    • (A) 0.1 to 1 nm
      (B) 1 to 10 nm
    • (C) 1 to 100 nm
      (D) 10 to 100 nm
    • (C) 1 to 100 nm
    • Q. 6  Which of the following is not true for soft magnetic materials? They have
    • (A) low coercivity
      (B) low retentivity
    • (C) low permeability
      (D) high susceptibility
    • (C) low permeability
    • Q. 7  The life time of an atom in metastable state is of order of _______seconds.
    • (A) 10-9 – 10-8
      (B) 10-8 – 10-6
    • (C) 10-6 – 10-3
      (D) 10-3 – 10-2
    • (D) 10-3 – 10-2
    • Q. 8  Weber Fechner law is given as____________.
    • (A) L = K / log10I
      (B) L = Klog10I
    • (C) I = K / log10 L
      (D) I = K log10L
    • (B) L = Klog10I
    • Q. 9  _________ is a naturally available dielectric material.
    • (A) air
      (B) nitrogen
    • (C) inert gas
      (D) sulphur hexafluoride
    • (A) air
    • Q. 10  The general chemical formula for a ferrite is ____________
    • (A) MOFe2O4 or MFe2O4
      (B) MOFe2O3 or MFe2O4
    • (C) MOFe3O3 or MFe3O4
      (D) MOFe2O2 or MFe2O3
    • (B) MOFe2O3 or MFe2O4
    • Q. 11  Unit of loudness is ________.
    • (A) Hertz
      (B) phon
    • (C) second
      (D) sabine-m2
    • (B) phon
    • Q. 12  The relation between transition temperature Tc of a superconductor and its isotopic mass M is given as__________.
    • (A) Tc a M-1/2
      (B) Tc a M1/2
    • (C) Tc a 2M-1/2
      (D) Tc a 2M1/2
    • (A) Tc a M-1/2
    • Q. 13  For superconductors magnetic susceptibility ?m = _______.
    • (A) 0
      (B) 1
    • (C) -1
      (D) 8
    • (C) -1
    • Q. 14  Electrical pumping is adopted in __________laser.
    • (A) Nd:YAG
      (B) CO2
    • (C) Ruby
      (D) Semiconductor
    • (B) CO2