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Two changes \(+q\) and \(-q\) are attached to the two ends of a light rod of length \(L\), as shown in figure. The system is given a velocity \(v\) perpendicular to magnetic field \(\vec{B}\). The magnetic force on the system of charges and magnitude of force on one charge by the rod, are respectively
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The correct answer is:
zero, \(q v B\)
Net charge on system $=0$
$\therefore \quad$ Net force on system $=0$.
Now consider one charge : $F=q v B$.
$\therefore \quad$ Net force on system $=0$.
Now consider one charge : $F=q v B$.
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