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

Magnetism and Electromagnetism | Practice MCQs Physics for Mdcat

7 of 127 questions (Page 4 of 19)

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22 The magnetic force acting on a unit positive charge moving perpendicular to the magnetic field with a unit velocity is called:
Correct Answer: B
Explanation: This defines magnetic field intensity ($\vec{B}$).
23 The SI unit of magnetic induction is:
Correct Answer: B
Explanation: Tesla is the SI unit of magnetic induction (flux density).
24 A current carrying conductor is placed in a uniform magnetic field parallel to it. The magnetic force experienced by the conductor is:
Correct Answer: C
Explanation: No force acts if current and field are parallel.
25 The SI unit of magnetic induction is tesla which is also equal to:
Correct Answer: A
Explanation: 1 Tesla = 1 N/(A·m).
26 The relationship between tesla (T) and smaller unit Gauss (G) of magnetic induction is given by:
Correct Answer: D
Explanation: 1 Tesla = $10^4$ Gauss.
27 A 5 meter wire carrying a current of 2A is at right angles to the uniform magnetic field of 0.5 weber/m². The force on the wire is:
Correct Answer: C
Explanation: $F = BIL = 0.5 \times 2 \times 5 = 5$ N.
28 Total number of lines of magnetic induction passing through any surface placed perpendicular to the field is called:
Correct Answer: C
Explanation: Magnetic flux ($\Phi$) counts the field lines through a surface.
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