Chapter 12

NCERT
Class 10
Science
Solutions
2. 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?

Question:

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?

Answer:

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.

Buy Latest Books

Teacher's Corner