JEE Main 202311 AprilEvening Shift
- Exam
- JEE Main
- Year
- 2023
- Date
- 11 April
- Shift
- Evening Shift
- Subject
- Physics
- Chapter
- Magnetic Properties of Matter
JEE Main 2023 · 11 April · Evening Shift · Physics · Magnetic Properties of Matter
Given below are two statements: one is labelled as Assertion A and...
Given below are two statements: one is labelled as
Assertion and the other is labelled as Reason
Assertion : A bar magnet dropped through a metallic cylindrical pipe takes more time to come down compared to a non-magnetic bar with same geometry and mass.
Reason : For the magnetic bar, Eddy currents are produced in the metallic pipe which oppose the motion of the magnetic bar.
In the light of the above statements, choose the correct answer from the options given below
Assertion and the other is labelled as Reason
Assertion : A bar magnet dropped through a metallic cylindrical pipe takes more time to come down compared to a non-magnetic bar with same geometry and mass.
Reason : For the magnetic bar, Eddy currents are produced in the metallic pipe which oppose the motion of the magnetic bar.
In the light of the above statements, choose the correct answer from the options given below
Options
- A is false but is true
- BBoth and R are true and is the correct explanation of
- C is true but is false
- DBoth and are true and is NOT the correct explanation of
Correct answer
B. Both and R are true and is the correct explanation of
Step-by-step solution
Due to change in flux, eddy current is produced which opposes the motion in the metallic pipe for the bar magnet.
Eddy currents are loops of electrical current induced within conductors by a changing magnetic field in the conductor according to Faraday's law of induction. Eddy currents flow in closed loops within conductors, in planes perpendicular to the magnetic field.
Hence, is the correct explanation and both statements are true.