JEE Main 2015PhysicsMagnetic Effects of CurrentMediumMCQ

JEE Main 2015 — Magnetic Effects of Current Question with Solution

JEE Main 2015 (10 Apr Online)

Question

A proton (mass m) accelerated by a potential difference V flies through a uniform transverse magnetic field B. The field occupies a region of space by width d. If α be the angle of deviation of proton from the initial direction of motion (see figure), the value of sin⁡α  will be:

Choose an option

Show full solutionCorrect option: B
Correct answer
BBdq2mV

Step-by-step explanation



Due to potential difference V speed acquired by proton is v0,

⇒qV=12mv02=K

∵Radius, R=mv0qB=2mKqB
∵K=qV
R=2meVqB
sinα=dR=dqB2meV=Bdq2mV

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About this question

This is a previous-year question from JEE Main 2015, covering the Magnetic Effects of Current chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.