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In Activity 13.9, how do we think the displacement of rod AB will be affected if
(i) the current in rod AB is increased;
(ii) a stronger horse-shoe magnet is used, and
(iii) the length of the rod AB is increased?
We know that if an electric current (I) is passed through a conductor of length l placed in a magnetic field (B), then the force acting :
F = BIL ... (1)
(i) If the current is increased, then from eq. (1), F ∝ I i.e., Rod AB is more displaced.
(ii) If a stronger horse-shoe magnet is used then from eq. (1), F ∝ B, i.e., Rod AB is more displaced.
(iii) If the length of rod AB is increased, then from eq. (1), F ∝ l, i.e., Rod AB is more displaced.
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