Electromagnetism MCQs for MDCAT Practice

Physics section, Electromagnetism chapter. Sample questions from past PMC papers.

1. Question 1
   The direction of the magnetic line of force depends upon:
   • A.Nature of the material of the conducting wire
   • B.Area of the conducting wire
   • C.Amount of the current
   • D.Direction of the current
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2. Question 2
   The magnetic flux will be maximum, for an angle of:
   • A.0o
   • B.90o
   • C.60o
   • D.180o
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3. Question 3
   What is the formula for magnetic flux?
   • A.BA cos(θ)
   • B.BA
   • C.B
   • D.BA sin(θ)
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4. Question 4
   A 20.0 cm wire carrying a current of 10.0 A is placed in a uniform magnetic field of 3.0 T. If the wire makes an angle of 40^(o) with the direction of the magnetic field. Find the (approx) magnitude of the force acting on the wire? (Sin 40^(o) = 0.642)
   • A.2.71 N
   • B.6.61 N
   • C.7.61 N
   • D.0.39 N
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5. Question 5
   Which one of the following particles moving in the magnetic field cannot be deflected:
   • A.α-particle
   • B.Electron
   • C.β-particle
   • D.Neutron
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6. Question 6
   When a charged particle is project perpendicular to a uniform magnetic field, the radius of the circulating path it traverses is proportional to:
   • A.1/(mass of particle)
   • B.1/(charge of particle)
   • C.1/(applied magnetic field)
   • D.both "B" and "C"
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7. Question 7
   The normal to a certain 1m2 area makes an angle of 60o with a uniform magnetic field. The magnetic flux through this area is the same as the flux through a second area that is perpendicular to the field if the second area is:
   • A.0.866 m2
   • B.1.15 m2
   • C.0.5 m2
   • D.2 m2
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8. Question 8
   A magnetic field cannot :-
   • A.Exert a force on charged particle
   • B.Change the velocity of charged particle
   • C.Change the momentum of charged particle
   • D.Change the kinetic energy of charged particle
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