? GTU Engineering 1st Year MCQ | Physics-2110011 Summer 2017 Sem-2

MCQ(s) of Physics (2110011) - Summer 2017 Sem-2

    • Q. 1  The magnatic susceptibility is equal to ________
    • (A) X=mH
      (B) X=mH/B
    • (C) X=m/H
      (D) X=mB/H
    • (C) X=m/H
    • Q. 2  The internal or Lorentz field equals to______________
    • (A) Ei = E + Ec
      (B) E = (P/ 3ε0)
    • (C) E = E + (P2/ 3ε0)
      (D) Ei = E + ( P/ 3ε0)
    • (D) Ei = E + ( P/ 3ε0)
    • Q. 3  __________dB is the sound level for the threshold of pain.
    • (A) 0 dB
      (B) 120 dB
    • (C) 110 dB
      (D) 10-12 dB
    • (B) 120 dB
    • Q. 4  Magnetostriction effect is obtained from ________ material.
    • (A) Dia
      (B) Pera
    • (C) Ferro
      (D) Ferri
    • (C) Ferro
    • Q. 5  The resistivity of liquid helium drops to zero at _______ K
    • (A) 3.8 K
      (B) 4.2 K
    • (C) 6 K
      (D) 0 K
    • (B) 4.2 K
    • Q. 6  From the following , Soft magnetic materials are used in ________
    • (A) transformer cores
      (B) dc meters
    • (C) microphones
      (D) compass needles
    • (A) transformer cores
    • Q. 7  ____________is the process to synthesize Metallic Glass
    • (A) ball milling
      (B) plasma arching
    • (C) melt spinning technique
      (D) CVD
    • (C) melt spinning technique
    • Q. 8  The following are the structure of CNT
    • (A) Chiral
      (B) Armchair
    • (C) zigzag
      (D) all of these
    • (C) zigzag
    • Q. 9  The dimensional formula for frequency of ultrasonic sound is
    • (A) M0L0T0
      (B) M0L-1T0
    • (C) M0L0T-1
      (D) M0L-1T-1
    • (C) M0L0T-1
    • Q. 10  Curie - Weiss law is ________
    • (A) χ = C/ (T-θ)
      (B) χ = C/ (2T-θ)
    • (C) χ = C/ (T+θ)
      (D) none of this
    • (A) χ = C/ (T-θ)
    • Q. 11  In Nd: YAG laser ______ kind of pumping is used.
    • (A) optical pumping
      (B) direct electron excitation
    • (C) inelastic atom collision
      (D) none of these
    • (A) optical pumping
    • Q. 12  The mathematical expression for existence of stimulated emission is proposed by ___________
    • (A) Newton
      (B) Ohm
    • (C) Pascal
      (D) Einstein
    • (D) Einstein
    • Q. 13  The electronic polarization of a solid material which contains N number of atoms are
    • (A) Pe = N 2 π ε0 R3 E
      (B) Pe = N π ε0 R3 E
    • (C) Pe = N 4 π ε0 R3 E
      (D) Pe = N 4 π ε0 R3
    • (C) Pe = N 4 π ε0 R3 E
    • Q. 14  According to Snell's law
    • (A) n1/n2 = sin  φ1 / sin  φ2
      (B) n1/n2 = sin  φ2 / sin  φ1
    • (C) n1/n2 = sin  φ1 + sin  φ2
      (D) n1/n2 = sin2  φ1 / sin2  φ2
    • (B) n1/n2 = sin  φ2 / sin  φ1