Question 79: Electromagnetic Induction

Question

Spherical insulating ball and a spherical metallic ball of same size and mass are dropped from the same height. Choose the correct statement out of the following
{Assume negligible air friction}

Accepted Answer

The correct answer is option C: the insulating ball will reach the earth's surface earlier than the metal ball.
When the two balls are dropped from the same height, they will experience the same gravitational force, which will cause them to accelerate downwards. However, According to FaradayÃ¢ÂÂs law of electromagnetic  induction motion of metal is opposed by earth magnetic  field. Which will slightly reduce its acceleration.
On the other hand, the insulating ball will not experience any electromagnetic  induction. Therefore, it will accelerate downwards at a slightly faster rate than the metal ball. As a result, the insulating ball will reach the earth's surface earlier than the metal ball.
So, option C is the correct statement.

Answer

Metal ball will reach the earth's surface earlier than the insulating ball

Answer

Both will reach the earth's surface simultaneously.

Answer

Insulating ball will reach the earth's surface earlier than the metal ball

Answer

Time taken by them to reach the earth's surface will be independent of the properties of their materials

Electromagnetic Induction

Spherical insulating ball and a spherical metallic ball of same size and mass are dropped from the same height. Choose the correct statement out of the following {Assume negligible air friction}

Choose the correct answer: