MDCAT Electromagnetism MCQs

This comprehensive set of MCQs on Electromagnetism is designed to cover all essential topics required for success in the Medical and Dental College Admission Test (MDCAT). Focused on key subjects such as Magnetic Fields, Electromagnetic Induction, Faraday’s Law, and the Relationship between Electricity and Magnetism, these MCQs are crafted to help aspiring medical and dental students build a solid understanding of electromagnetism and its applications in health sciences.

Who should practice Electromagnetism MCQs?

Students preparing for the MDCAT who wish to deepen their understanding of electromagnetic principles, which are vital for medical technologies such as MRI and other diagnostic tools.
Individuals seeking to enhance their knowledge of the interaction between electric currents and magnetic fields, crucial for understanding how medical devices operate.
University students targeting high-yield topics like electromagnetic waves and their applications in communication and medical imaging.
Anyone aiming to strengthen their foundational understanding of electromagnetism and its implications in biological systems and healthcare innovations.
Candidates focused on developing critical thinking and analytical skills related to electromagnetic theory and its real-world applications in medical fields.

1. The region around a magnetic material where its influence can be felt is called the:

A) Magnetic flux
B) Magnetic field
C) Magnetic moment
D) Electric field

View Answer

2. The unit of magnetic flux is:

A) Tesla
B) Weber
C) Henry
D) Ampere

View Answer

3. What is the SI unit of magnetic field strength?

A) Coulomb
B) Ampere
C) Tesla
D) Volt

View Answer

4. The magnetic flux passing through a surface is given by the product of:

A) Magnetic field and volume
B) Magnetic field and surface area
C) Electric field and surface area
D) Electric field and volume

View Answer

5. A magnetic field line is a path along which:

A) A magnetic monopole moves
B) A positive charge moves
C) A magnetic dipole moves
D) An electric current flows

View Answer

6. The relationship between magnetic flux density (B) and magnetic field strength (H) in free space is:

A) B = μ₀H
B) B = μ₀/H
C) B = H²/μ₀
D) B = μ₀²H

View Answer

7. Which of the following materials is strongly attracted by a magnetic field?

A) Diamagnetic
B) Paramagnetic
C) Ferromagnetic
D) Non-magnetic

View Answer

8. Magnetic flux is defined as the:

A) Number of magnetic field lines passing through a given area
B) Force experienced by a moving charge in a magnetic field
C) Energy stored in a magnetic field
D) Charge stored by a capacitor

View Answer

9. The total magnetic flux through a closed surface is:

A) Infinite
B) Zero
C) Constant
D) Proportional to electric field

View Answer

10. The direction of magnetic field lines inside a bar magnet is:

A) From north to south
B) From south to north
C) From center to surface
D) Circular around the magnet

View Answer

11. What happens to the magnetic field around a wire when the current in the wire increases?

A) It decreases
B) It increases
C) It remains constant
D) It reverses direction

View Answer

12. Magnetic flux density is measured in:

A) Tesla
B) Weber
C) Gauss
D) Henry

View Answer

13. Which law states that the force between two current-carrying wires is directly proportional to the product of the currents?

A) Coulomb’s law
B) Ampere’s law
C) Faraday’s law
D) Biot-Savart law

View Answer

14. Magnetic field intensity at the center of a circular coil of radius R is proportional to:

A) 1/R
B) 1/R²
C) R
D) R²

View Answer

15. Magnetic flux density at a point due to a current-carrying wire is:

A) Inversely proportional to the distance from the wire
B) Directly proportional to the square of the distance
C) Constant throughout
D) Zero at infinity

View Answer

16. The force on a moving charge in a magnetic field is called the:

A) Electromagnetic force
B) Lorentz force
C) Electric force
D) Coulomb force

View Answer

17. Which device is used to measure magnetic field strength?

A) Voltmeter
B) Galvanometer
C) Magnetometer
D) Ammeter

View Answer

18. Magnetic flux density is the amount of magnetic flux:

A) Perpendicular to the surface
B) Passing through a unit area
C) Stored in a magnetic field
D) Produced by a current

View Answer

19. Which of the following is a vector quantity?

A) Magnetic flux
B) Magnetic flux density
C) Electric potential
D) Electric charge

View Answer

20. The magnetic flux through a surface is zero if:

A) The surface is parallel to the magnetic field
B) The surface is perpendicular to the magnetic field
C) The magnetic field is zero
D) The surface area is large

View Answer

21. Which of the following materials is repelled by a magnetic field?

A) Ferromagnetic
B) Paramagnetic
C) Diamagnetic
D) Non-magnetic

View Answer

22. Magnetic field lines never:

A) Cross each other
B) Form closed loops
C) Start or end at infinity
D) Pass through conductors

View Answer

23. What is the effect of increasing the number of turns in a solenoid on the magnetic field?

A) It decreases the field
B) It increases the field
C) It has no effect
D) It depends on the current

View Answer

24. A solenoid is:

A) A coil of wire with a current passing through it
B) A bar magnet
C) A permanent magnet
D) A material with no magnetic properties

View Answer

25. What happens to the magnetic flux if the magnetic field strength is doubled?

A) It remains the same
B) It is halved
C) It doubles
D) It becomes zero

View Answer

26. The number of magnetic field lines passing through a unit area is called:

A) Magnetic flux
B) Magnetic field strength
C) Magnetic flux density
D) Electric flux

View Answer

27. The unit of the temperature coefficient of resistance is:

A) Kelvin
B) Ohms/°C
C) Ohms
D) None

View Answer

28. Magnetic flux density at the center of a solenoid is proportional to:

A) Number of turns
B) Current
C) Length
D) Both A and B

View Answer

29. What is the force on a stationary charge in a magnetic field?

A) Maximum
B) Zero
C) Minimum
D) Infinite

View Answer

30. The strength of a magnetic field produced by a current-carrying wire is:

A) Directly proportional to the distance
B) Inversely proportional to the current
C) Directly proportional to the current
D) Independent of the current

View Answer

31. In an electromagnetic wave, the magnetic field is perpendicular to:

A) The electric field
B) The direction of wave propagation
C) Both A and B
D) Neither A nor B

View Answer

32. The unit of magnetic permeability is:

A) Henry/meter
B) Weber/m²
C) Tesla
D) Ampere/meter

View Answer

33. The magnetic field inside a long straight solenoid carrying current is:

A) Zero
B) Constant
C) Directly proportional to the radius
D) Varies with position

View Answer

34. The force between two parallel current-carrying wires is:

A) Attractive if the currents are in the same direction
B) Repulsive if the currents are in the same direction
C) Attractive if the currents are in opposite directions
D) Zero in all cases

View Answer

35. The formula for the magnetic force on a charge moving in a magnetic field is given by:

A) F = qE
B) F = qvB sinθ
C) F = qvB cosθ
D) F = qB sinθ

View Answer

36. Magnetic flux through a coil is maximum when the coil is:

A) Parallel to the magnetic field
B) Perpendicular to the magnetic field
C) At an angle of 45° to the magnetic field
D) Any angle to the magnetic field

View Answer

37. If a magnetic field is applied parallel to the velocity of a charged particle, the particle will:

A) Move in a circle
B) Move in a straight line
C) Move in a spiral
D) Stop moving

View Answer

38. Magnetic flux depends on:

A) Magnetic field strength and area
B) Electric field strength
C) Resistance
D) Voltage

View Answer

39. Which of the following is a magnetic property of materials?

A) Permeability
B) Resistance
C) Voltage
D) Capacitance

View Answer

40. The magnetic field inside a toroid is:

A) Constant
B) Zero
C) Varies with radius
D) Varies with current

View Answer

41. In a uniform magnetic field, a charged particle follows:

A) A circular path
B) A straight path
C) A helical path
D) A parabolic path

View Answer

42. The potential difference across a resistor is directly proportional to the:

A) Resistance
B) Capacitance
C) Magnetic flux
D) Current

View Answer

43. The direction of the force on a charged particle moving in a magnetic field is given by:

A) Coulomb’s law
B) Ampere’s law
C) Right-hand rule
D) Lenz’s law

View Answer

44. The magnetic force on a current-carrying conductor in a magnetic field is:

A) Perpendicular to both the magnetic field and the current
B) Parallel to the magnetic field
C) Parallel to the current
D) Zero

View Answer

45. A moving charge in a magnetic field experiences maximum force when:

A) Its velocity is parallel to the field
B) Its velocity is perpendicular to the field
C) It is stationary
D) It is in motion but not moving parallel or perpendicular

View Answer

46. The magnetic moment of a coil is proportional to:

A) Current and number of turns
B) Resistance and current
C) Capacitance and voltage
D) Area and voltage

View Answer

47. A current-carrying loop of wire placed in a magnetic field experiences a:

A) Voltage
B) Force
C) Magnetic flux
D) Electric charge

View Answer

48. Magnetic dipole moment is a measure of:

A) Strength of a magnetic field
B) Charge in a system
C) Separation of poles in a magnet
D) Voltage

View Answer

49. The net magnetic flux through a closed surface is:

A) Always zero
B) Infinite
C) Positive
D) Depends on the material

View Answer

50. The induced magnetic field in a solenoid is:

A) Directly proportional to the number of turns
B) Inversely proportional to the number of turns
C) Zero
D) Depends on the direction of the magnetic field

View Answer

51. In a solenoid, the magnetic field is strongest:

A) At the ends
B) In the center
C) Outside the solenoid
D) Along the sides

View Answer

52. The direction of the magnetic field due to a current-carrying wire is determined by:

A) Lenz’s law
B) Right-hand rule
C) Coulomb’s law
D) Faraday’s law

View Answer

53. A moving charge in a magnetic field will experience no force if it moves:

A) Parallel to the magnetic field
B) Perpendicular to the magnetic field
C) At an angle to the magnetic field
D) In any direction

View Answer

54. Magnetic flux through a surface is proportional to:

A) The magnetic field strength
B) The angle between the surface and the field
C) The area of the surface
D) All of the above

View Answer

55. What happens to the magnetic field strength if the distance from the source is doubled?

A) It remains the same
B) It becomes half
C) It decreases by a factor of four
D) It doubles

View Answer

56. Which of the following is a scalar quantity?

A) Magnetic flux
B) Magnetic field
C) Magnetic flux density
D) Magnetic moment

View Answer

57. The force between two current-carrying conductors is:

A) Directly proportional to the product of the currents
B) Inversely proportional to the distance between them
C) Both A and B
D) None of the above

View Answer

58. A magnetic material that has no unpaired electrons and is weakly repelled by a magnetic field is called:

A) Paramagnetic
B) Ferromagnetic
C) Diamagnetic
D) Antiferromagnetic

View Answer

59. In a magnetic field, the potential energy of a magnetic dipole is minimum when it is:

A) Perpendicular to the field
B) Parallel to the field
C) At an angle to the field
D) Zero

View Answer

60. The SI unit of magnetic moment is:

A) Ampere-meter
B) Tesla
C) Weber
D) Coulomb

View Answer

61. The magnetic field inside a current-carrying solenoid is:

A) Radial
B) Constant
C) Zero
D) Maximum at the ends

View Answer

62. Magnetic flux through a loop is zero when the loop is:

A) Parallel to the magnetic field
B) Perpendicular to the magnetic field
C) At an angle of 45° to the field
D) Any of the above

View Answer

63. What happens to the direction of the magnetic force on a positive charge when the direction of the magnetic field is reversed?

A) It stays the same
B) It reverses
C) It doubles
D) It becomes zero

View Answer

64. The product of magnetic flux density and velocity of a charged particle in a magnetic field is known as:

A) Magnetic flux
B) Magnetic force
C) Magnetic moment
D) Lorentz force

View Answer

65. The magnetic field around a straight conductor carrying current is:

A) Radial
B) Circular
C) Straight
D) Elliptical

View Answer

66. Which of the following is not a unit of magnetic flux?

A) Weber
B) Tesla
C) Maxwell
D) Henry

View Answer

67. The strength of a magnetic field due to a solenoid can be increased by:

A) Reducing the current
B) Reducing the number of turns
C) Increasing the current
D) Decreasing the length of the solenoid

View Answer

68. The force on a current-carrying wire in a magnetic field is proportional to:

A) The length of the wire
B) The current in the wire
C) The strength of the magnetic field
D) All of the above

View Answer

69. A charged particle moves through a magnetic field with velocity v and experiences a force F. If the velocity is doubled, the force will:

A) Remain the same
B) Be halved
C) Be doubled
D) Be quadrupled

View Answer

70. The magnetic moment of a current loop depends on:

A) Current
B) Area of the loop
C) Number of turns
D) All of the above

View Answer

71. The path of a charged particle in a magnetic field is:

A) Straight
B) Circular
C) Elliptical
D) Depends on the velocity

View Answer

72. Magnetic flux through a surface depends on:

A) Magnetic field strength
B) Angle between the field and the surface
C) Area of the surface
D) All of the above

View Answer

73. The strength of a magnetic field at a point inside a solenoid is:

A) Zero
B) Maximum
C) Depends on the current
D) Constant throughout

View Answer

74. Magnetic flux density inside a toroid is:

A) Uniform
B) Zero
C) Depends on the current
D) Maximum at the center

View Answer

75. The direction of magnetic field lines around a straight current-carrying wire is:

A) Radial
B) Circular
C) Perpendicular to the wire
D) Along the wire

View Answer

76. Magnetic field intensity at a point in space depends on:

A) Distance from the source
B) Current producing the field
C) Medium in which the field exists
D) All of the above

View Answer

77. The force between two parallel current-carrying wires is:

A) Zero
B) Attractive if the currents are in the same direction
C) Repulsive if the currents are in opposite directions
D) Both B and C

View Answer

78. The unit of magnetic flux is:

A) Tesla
B) Weber
C) Newton
D) Volt

View Answer

79. The magnetic field around a solenoid is:

A) Maximum at the center
B) Zero at the ends
C) Uniform inside the solenoid
D) Radial outside the solenoid

View Answer

80. The strength of the magnetic field in a solenoid is directly proportional to:

A) Length of the solenoid
B) Number of turns
C) Current passing through the solenoid
D) Both B and C

View Answer

81. The unit of magnetic flux density is:

A) Weber
B) Tesla
C) Henry
D) Joule

View Answer

82. Magnetic flux through a coil depends on:

A) The magnetic field strength
B) The area of the coil
C) The number of turns in the coil
D) All of the above

View Answer

83. A moving charge experiences maximum force in a magnetic field when it moves:

A) Parallel to the magnetic field
B) Perpendicular to the magnetic field
C) At an angle of 45° to the field
D) Along the magnetic field lines

View Answer

84. The force on a charged particle in a magnetic field is zero when:

A) It moves parallel to the field
B) It moves perpendicular to the field
C) It is at rest
D) Both A and C

View Answer

85. The magnetic flux through a surface is maximum when the surface is:

A) Parallel to the magnetic field
B) Perpendicular to the magnetic field
C) At an angle of 45° to the field
D) Zero

View Answer

86. Magnetic field lines:

A) Never intersect
B) Always intersect
C) Are straight
D) Are always closed loops

View Answer

87. What happens to the force on a current-carrying wire in a magnetic field if the length of the wire is doubled?

A) The force is halved
B) The force is doubled
C) The force remains the same
D) The force becomes zero

View Answer

88. The SI unit of magnetic flux is:

A) Tesla
B) Weber
C) Gauss
D) Ampere

View Answer

89. A wire carrying current I is bent into a circular loop of radius R. The magnetic field at the center of the loop is proportional to:

A) I/R
B) I²R
C) R/I
D) I/R²

View Answer

90. The force between two current-carrying wires is proportional to:

A) The distance between the wires
B) The currents in the wires
C) The length of the wires
D) Both B and C

View Answer

91. The direction of magnetic field lines inside a magnet is:

A) From north to south
B) From south to north
C) Radial
D) Circular

View Answer

92. Magnetic flux density is defined as:

A) Magnetic flux per unit area
B) Magnetic field strength per unit length
C) Magnetic flux per unit volume
D) None of the above

View Answer

93. The magnetic field at the center of a circular current loop depends on:

A) The radius of the loop
B) The current in the loop
C) The number of turns in the loop
D) All of the above

View Answer

94. The unit of magnetic flux density is:

A) Weber per square meter
B) Joules per ampere
C) Newton per meter
D) Weber per ampere

View Answer

95. A magnetic field exerts a force on a:

A) Stationary charge
B) Moving charge
C) Neutral particle
D) Both A and B

View Answer

96. A charged particle moves in a circular path in a magnetic field. The radius of the path depends on:

A) The charge of the particle
B) The velocity of the particle
C) The strength of the magnetic field
D) All of the above

View Answer

97. The force on a moving charge in a magnetic field is given by:

A) F = qE
B) F = qvB sinθ
C) F = mv²/r
D) F = qB

View Answer

98. What is the SI unit of the magnetic field?

A) Tesla
B) Weber
C) Newton
D) Ampere

View Answer

99. A particle moving perpendicular to a magnetic field describes a:

A) Straight path
B) Circular path
C) Parabolic path
D) Elliptical path

View Answer

100. Which quantity represents the number of magnetic field lines passing through a surface?

A) Magnetic flux
B) Magnetic field strength
C) Magnetic flux density
D) Magnetic moment

View Answer