Magnetism and Electromagnetism | Practice MCQs Physics for Mdcat | mosaicbro.com

Magnetism and Electromagnetism | Practice MCQs Physics for Mdcat

7 of 127 questions (Page 3 of 19)

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15 The most suitable material making permanent magnet is:
Correct Answer: B
Explanation: Steel retains magnetism well, making it suitable for permanent magnets.
16 The magnetic field at a point due to a current carrying conductor is directly proportional to:
Correct Answer: C
Explanation: The field $B$ is proportional to current $I$ (Biot-Savart law).
17 Two lines of magnetic force:
Correct Answer: C
Explanation: Magnetic field lines never cross; they represent unique field directions.
18 A charged particle moving in a magnetic field experiences a magnetic force given by:
Correct Answer: A
Explanation: The Lorentz force is $\vec{F} = q\vec{v} \times \vec{B}$.
19 A charged particle moving in a magnetic field experiences a resultant force:
Correct Answer: C
Explanation: The Lorentz force is perpendicular to both $\vec{v}$ and $\vec{B}$.
20 The magnetic force experienced by a charged particle moving in a magnetic field will be maximum if it moves:
Correct Answer: D
Explanation: Force is maximized when $\sin \theta = 1$ ($\theta = 90^\circ$).
21 Force on a charged particle having charge ‘q’ moving with velocity V parallel to magnetic field of intensity B is given as:
Correct Answer: D
Explanation: No force acts if $\vec{v}$ is parallel to $\vec{B}$ ($\sin 0^\circ = 0$).
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