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प्रश्न
A charged particle is moved along a magnetic field line. The magnetic force on the particle is
विकल्प
along its velocity
opposite to its velocity
perpendicular to its velocity
zero
उत्तर
zero
The force on a charged particle q moving with velocity v in a magnetic field B is given by
\[( \vec{v} \times \vec{B} ) = 0\]
\[ \Rightarrow \vec{F} = 0\]
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