JEE Main 202331 JanuaryMorning Shift
- Exam
- JEE Main
- Year
- 2023
- Date
- 31 January
- Shift
- Morning Shift
- Subject
- Physics
- Chapter
- Gravitation
JEE Main 2023 · 31 January · Morning Shift · Physics · Gravitation
Spherical insulating ball and a spherical metallic ball of same...
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}
Options
- ATime taken by them to reach the earth's surface will be independent of the properties of their materials
- BInsulating ball will reach the earth's surface earlier than the metal ball
- CBoth will reach the earth's surface simultaneously
- DMetal ball will reach the earth's surface earlier than the insulating ball
Correct answer
B. Insulating ball will reach the earth's surface earlier than the metal ball
Step-by-step solution
When a spherical insulating ball and a spherical metallic ball of same size and mass are dropped from the same height, then magnetic field will act on metallic ball. If the earth's magnetic field is taken into account, then an induced eddy current will form inside the spherical metallic ball, thus retarding its motion. Hence, it will take more time than insulating ball.