Question

In a region of space a uniform electric field of strength IN a uniform magnetic field of strength ' B' and uniform gravitational field of strength 'g' co- exist in mutually perpendicular directions.A charged particle (m q) is moving with uniform velocity and perpendicular to the magnetic field in this region. Once the particle leaves this region and begins moving into another region where there is only gravitational field of strength 'g' its speed begins to decrease.Minimum speed of the particle in subsequent motion is​

Answer 1

Answer:

ANSWER

a. Velocity of the particle can be constant if the electric force balances the magnetic force, i.e., qE=qv×B.

b. If E=0, the particle can trace circular path if v⊥B.

c. If E=0, kinetic energy remains constant, because magnetic force is not doing any work.

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