Free Electromagnetism MCQs with Answers
1,176 Electromagnetism MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Magnetic flux density and magnetic flux describe the strength of a magnetic field and the field passing through a surface. A charged particle moving through a magnetic field experiences a force perpendicular to its velocity and may follow circular or helical motion, depending on the angle between velocity and field.
Last updated
Read the Electromagnetism notesFree MDCAT chapter notes with key terms1,176 questions · page 6 of 59
- A. Radially inward
- B. Radially outward
- C. Zero
- D. Parallel to axis of solenoid
Explanation: The correct option for the question is Zero. When a proton is moving along the axis of a solenoid, the magnetic force on the proton is…
Correct answer: Zero- A. qvB sinθ
- B. qvB cosθ
- C. qvB
- D. Zero
Explanation: The magnetic force on a charge is given by the Lorentz force law, which can be stated as: F=q(v×B)where:F is the magnetic force,q is the…
Correct answer: Zero- A. Electric Field applied in direction of motion
- B. Electric Field applied perpendicular to direction of motion
- C. Magnetic Field applied in direction of motion
- D. Magnetic Field applied perpendicular to direction of motion
Explanation: Here is the explanation of the correct optionF = q(v x b)As v & b are in same direction so their cross product is zero F = q (0)F = 0(The…
Correct answer: Magnetic Field applied in direction of motion- A. 3 N.
- B. 4 N.
- C. 5 N.
- D. 6 N.
Explanation: F = QvBsin(θ)Where: * F is the magnetic force * Q is the charge of the particle * v is the velocity of the particle * B is the magnetic…
Correct answer: 6 N.- A. 1.6 x 10^-25 N.
- B. 1.6 x 10^-13 N.
- C. 1.6 x 10^13 N.
- D. 1.6 x 10^25 N
Explanation: The magnetic force on a charged particle moving perpendicular to a magnetic field is calculated using the formula F = qvB, where q is the…
Correct answer: 1.6 x 10^-13 N.- A. Mass.
- B. Volume.
- C. Direction of motion.
- D. Energy in the system.
Explanation: When a charged particle moves through a magnetic field, it experiences a magnetic force that acts perpendicular to both its velocity and…
Correct answer: Direction of motion.- A. At an angle of 30⁰.
- B. At an angle of 45⁰.
- C. Parallel to the field.
- D. Perpendicular to the field.
Explanation: The magnetic force experienced by a charged particle moving in a magnetic field is determined by the equation F = qvBsinθ, where θ is the…
Correct answer: Parallel to the field.- A. Electric force
- B. Centripetal force
- C. Magnetic force
- D. Gravitational force
Explanation: The magnetic force provides the necessary centripetal force to the charge particle. So, the charge particle moves in circular path
Correct answer: Centripetal force- A. r = \(\frac{mv}{eB}\)
- B. r = \(\frac{B}{mv}\)
- C. r = \(\frac{I}{v}\)
- D. r = \(\frac{I}{m}\)
Explanation: To find the radius of the circular path of an electron in a magnetic field, equate the magnetic force to the centripetal force.
Correct answer: r = \(\frac{mv}{eB}\)- A. α-particle
- B. Electron
- C. β-particle
- D. Neutron
Explanation: For a particle to be deflected it must have non-zero value for:B, q,vbut for neutron q=0 so F will also equal to zero and it will not get…
Correct answer: Neutron- A. 1:2:4
- B. 4:2:1
- C. 1:1:1
- D. 2:2:4
Explanation: p = mv, p = constant. Charge on proton, deuteron, and α-particle is +e, +e, and +2e respectively.
Correct answer: 1:2:4- A. Direction of current
- B. Quantity of current
- C. Both (a) and (b)
- D. None of the above
Explanation: This option is correct because the direction of magnetic lines of force is determined by the right-hand rule.
Correct answer: Direction of current- A. Magnetic flux
- B. Magnetic induction
- C. Faraday's law
- D. Electric flux
Explanation: The correct answer is Magnetic flux. The dot product of the magnetic field B and vector area A results in magnetic flux, represented…
Correct answer: Magnetic flux- A. A magnetic field is setup
- B. The lines of force are elliptical
- C. Both (a) and (b)
- D. None of these
Explanation: This is correct. According to Ampère's circuital law and Oersted's experiment, a magnetic field is established around a current-carrying…
Correct answer: A magnetic field is setup- A. Parallel to magnetic field
- B. Both option A and C
- C. Perpendicular to magnetic field
- D. None of these
Explanation: The magnetic force experienced by a charged particle moving in a magnetic field is given by the equation:\[ F = q \cdot v \cdot B \cdot…
Correct answer: Parallel to magnetic field- A. Replacing the loop by a coil
- B. Moving the loop faster
- C. Using the strong magnetic field
- D. All of the above
Explanation: The Explanation of this question will be added soon!
Correct answer: All of the above- A. Capacitor
- B. Resistance
- C. Inductor
- D. Solenoid
Explanation: A solenoid is a long, tightly wound cylindrical coil of wire, often with a ferromagnetic core inside.
Correct answer: Solenoid- A. Uniform and strong
- B. Uniform
- C. Strong
- D. Weak
Explanation: Magnetic field at the middle of the solenoid is both uniform and strong.
Correct answer: Uniform and strong- A. Negligibly weak
- B. Uniform
- C. Uniform and strong
- D. All of above
Explanation: Magnetic field outside of the solenoid is extremely weak and can be considered negligible.
Correct answer: Negligibly weak- A. Magnetic field
- B. Electric field
- C. Conservative field
- D. Gravitational field
Explanation: A charged particle moving in a magnetic field experiences a force perpendicular to both its velocity vector and the magnetic field…
Correct answer: Magnetic field