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Chapter 22, Problem 1OQ
To determine

The situation in which a spatially uniform magnetic field cannot exert a magnetic force on a particle.

Expert Solution & Answer
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Answer to Problem 1OQ

Option (c) and (e).

Explanation of Solution

Write the formula for magnetic force (Lorentz force)

  F=qv×B=qvBsinθ        (I)

Here, F is the magnetic force, q is charge of the particle, θ is the angle between v and B ,

and B is the magnitude of magnetic field.

If the particle is not charged or moves at an angle θ=0°, a uniform magnetic field cannot exert a magnetic force on a particle. As the magnetic field is depended upon the q and the B.

Conclusion

A spatially uniform magnetic field can exert a magnetic force on the particle which is charged. Thus, option (a) is incorrect.

A spatially uniform magnetic field that moves perpendicular to the magnetic field can exert magnetic force on the particle. Therefore, option (b) is incorrect.

A spatially uniform magnetic field cannot exert a magnetic force on the particle moving parallel to the magnetic field. Thus, option (c) is correct.

When the magnitude of the magnetic field changes, a spatially uniform magnetic field can exert a magnetic force on the particle. Thus, option (d) is incorrect.

A magnetic field that is spatially uniform cannot exert a magnetic force on the resting partcle Thus, option (e) is correct.

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Chapter 22 Solutions

Bundle: Principles of Physics: A Calculus-Based Text, 5th + WebAssign Printed Access Card for Serway/Jewett's Principles of Physics: A Calculus-Based Text, 5th Edition, Multi-Term

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