JEE Physics - MCQ Practice Questions
Practice free JEE Physics multiple-choice questions with detailed answers and explanations. Perfect for competitive exam preparation.
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Q.41Medium
A charged particle with charge q and mass m is moving with speed v in a circular path of radius r in a magnetic field. The magnetic field strength is:
Q.42Medium
The permeability of free space μ₀ has the value:
Q.43Medium
A long straight wire carrying current I produces a magnetic field at distance r. If the current is doubled and distance is halved, the magnetic field becomes:
Q.44Medium
The SI unit of magnetic flux density (magnetic field) is: