The bob of a simple pendulum is made of iron. Exactly below the equilibrium position of the pendulum, the pole of a strong magnet is placed. What will be the change in the time period of the pendulum?

The bob of a simple pendulum is made of iron. Exactly below the equili

1.	The bob of a simple pendulum is made of iron. Exactly below the equilibrium position of the pendulum, the pole of a strong magnet is placed. What will be the change in the time period of the pendulum?
Answer» SOLUTION :In addition to the GRAVITATIONAL force, MAGNETIC force of attraction of the magnet acts on the pendulum bob. If acceleration produced by the magnetic field on the bob is a, total acceleration of the pendulum bob g. = g + a `therefore` Time period of the simple pendulum `T=2pisqrt(L/(g+a))""...(1)` It is understood from equation (1) that the time period decreases due to the increase in acceleration of the pendulum bob.