MAGNETIC EFFECT OF CURRENT: MCQ ON MAGNETIC MATERIALS SET 1

  

Q1 An electric charge "q" moves with velocity "v" parallel to the magnetic field B then force on charged particle is

  • (a) Bqv 
  • (b) B/qv
  • (c) Zero 
  • (d) q/Bv

  • (c) Zero 

Q2 The dimensions of magnetic field intensity are

  • a) `M^{1}L^{1}T^{-1}`
  • b) `M^{1}T^{-2}A^{-1}`
  • c). `M^{1}T^{-2}A^{-2}`
  • d). `M^{1}T^{-1}A^{-1}`

  • b) `M^{1}T^{-2}A^{-1}`

Q3  Magnetic dipole moment is a vector quantity directed from

  • a) east to west
  • b) south to north
  • c) west to east
  • d) north to south

  • b) south to north

Q4 The magnetic susceptibility of an ideal diamagnetic substance is

  • a) 0
  • b) -1
  • c) +1
  • d) ∞

  • b) -1

Q5 A bar magnet of magnetic moment M is cut into two parts of equal lengths. The magnetic moment and pole strength of either part is:

  • a) M, m/2
  • b) M/2, m
  • c) M, m
  • d) M/2, m/2

  • b) M/2, m


Q6 The force between two magnetic poles is F. If the distance between  the poles and pole strengths of each pole are doubled, then the force experienced is:

  • a) F
  • b) F/4
  • c) 2F
  • d) F/2

  • a) F

Q7  Curie temperature is the temperature above which a ferromagnetic material becomes diamagnetic.

  • a) True
  • b) False 


  • b) False  

Q8 If horizontal and vertical components of earth's magnetic field are equal, then angle of dip is will be 

  • (a) `30^{0}`
  • (b) `60^{0}`
  • (c) `90^{0}`
  • (d) `45^{0}`

  • (d) `45^{0}`

Q9.  A stationary charge experience no magnetic Lorentz force. (T/F)

  • a) True
  • d) False 

  • (a) True 

Q10 Dimensional formula for magnetic dipole moment is:

  • a) `L^{2}A^{-1}`
  • b) `L^{2}A^{}`
  • c) `L^{2}A^{-2}`
  • d) `L^{1}A^{-1}`

  • b) `L^{2}A^{}`

  

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