Q. No 2: In Activity 13.7 (page: 230), how do we think the
displacement of rod AB will be affected if (i) current in rod AB is increased:
(ii) a stronger horse-shoe magnet is used: and (iii) length of the rod AB is
increased?
Ans: (i) If the current in the rod is increased then rod will be
deflected with greater force.
(ii) If a stronger horse-shoe magnet is used then also rod will
be deflected with greater force due to the increase in magnetic field.
(iii) If the length of the rod AB is increased.
if Length of rod AB increases then Resistance R increases therefore current decreases so deflection is less
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