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GUJCET · Physics · Moving Charges and Magnetism
When a charged particle moves perpendicular to the uniform magnetic field then ________.
- A Both momentum and kinetic energy remains the same
- B Both momentum and kinetic energy will change
- C It's momentum change, kinetic energy remains same
- D Kinetic energy changes, but momentum remains same.
Answer & Solution
Correct Answer
(C) It's momentum change, kinetic energy remains same
Step-by-step Solution
Detailed explanation
\(\overrightarrow{ F }=q(\vec{v} \times \overrightarrow{ B })\)
Magnetic force \(\overrightarrow{ F }\) is always perpendicular to both \(\vec{v}\) and \(\overrightarrow{ B }\) so the magnitude of velocity remains same, but the direction changes. So it's momentum change but kinetic energy remains constant.
Magnetic force \(\overrightarrow{ F }\) is always perpendicular to both \(\vec{v}\) and \(\overrightarrow{ B }\) so the magnitude of velocity remains same, but the direction changes. So it's momentum change but kinetic energy remains constant.
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