When a small magnet is allowed to fall through an aluminium pipe,it falls with an acceleration less than $g$. Why?
(N/A) As the magnet falls through the aluminium pipe,the magnetic flux linked with the pipe changes.
This change in magnetic flux induces eddy currents in the aluminium pipe according to Faraday's law of electromagnetic induction.
According to Lenz's law,these eddy currents create a magnetic field that opposes the motion of the falling magnet.
This opposing force acts upwards,reducing the net downward force on the magnet.
Consequently,the acceleration of the magnet becomes less than the acceleration due to gravity $(g)$.
This change in magnetic flux induces eddy currents in the aluminium pipe according to Faraday's law of electromagnetic induction.
According to Lenz's law,these eddy currents create a magnetic field that opposes the motion of the falling magnet.
This opposing force acts upwards,reducing the net downward force on the magnet.
Consequently,the acceleration of the magnet becomes less than the acceleration due to gravity $(g)$.
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Consider a metallic pipe with an inner radius of $1 \ cm$. If a cylindrical bar magnet of radius $0.8 \ cm$ is dropped through the pipe,it takes more time to come down than it takes for a similar unmagnetised cylindrical iron bar dropped through the metallic pipe. Explain.
Medium
View SolutionGiven below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: $A$ 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 $R$: 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 $A$: $A$ 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 $R$: 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:
$A$ bar magnet is released from rest along the axis of a very long vertical copper tube. After some time,the magnet will:
$A$ sheet is placed on a horizontal surface in front of a strong magnetic pole. $A$ force is needed to:
$A$. hold the sheet there if it is magnetic.
$B$. hold the sheet there if it is non-magnetic.
$C$. move the sheet away from the pole with uniform velocity if it is conducting.
$D$. move the sheet away from the pole with uniform velocity if it is both,non-conducting and non-polar.
Choose the correct statement$(s)$ from the options given below:
$A$. hold the sheet there if it is magnetic.
$B$. hold the sheet there if it is non-magnetic.
$C$. move the sheet away from the pole with uniform velocity if it is conducting.
$D$. move the sheet away from the pole with uniform velocity if it is both,non-conducting and non-polar.
Choose the correct statement$(s)$ from the options given below:
MediumNEET 2024
View SolutionThe core of a transformer is laminated so that
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