Question

In trial 1 of an experiment, a cow magnet is held above the floor and dropped from the height h. the time it takes the magnetic to hit the floor is recorded as t1. In trial 2, the same cow magnet is again held at height h but this time as it falls, it passes untouched through the center of solenoid with a diameter slightly larger thanw. the time it takes to hit the floor is recorded as t2. How will the two times compare?

A) since g is the same, t1 = t2

B ) t1>t2

C) t2>T1

Answer 1

given that the cow magnet is dropped from a height of h from ground and it takes a time t1 to reach the ground in a normal condition. and when the magnet is dropped from the same height and it passes through the solenoid, it takes a time t2.

here the times t1 and t2 are related as follows: t2>t1.

thsi is because the cow magnet passing through the solenoid creates a flux inside the solenoid coil. this becomes responsible for loss of some of the kinetic energy of the free falling magnet. so the magnet takes more time to reach the floor when falling through the solenoid than falling without any distractions.

So, t2>t1 which is option c.