What is the acceleration of a magnet when dropped towards a copper loop?

In summary, when a magnet is dropped towards a loop of copper, the acceleration of the magnet will be less than g due to the opposing force of the copper loop. This is explained by Lenz's law, which states that the direction of the induced current in the loop will be such that it opposes the original magnetic field. This phenomenon is known as eddy current.
  • #1
pratyushag
12
0

Homework Statement


A magnet is dropped towards a loop of copper .the acceleration of magnet will be ?



Homework Equations





The Attempt at a Solution



less than g ,because copper will oppose the relevant pole(im not sure why?)
 
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  • #2
Lenz's law
 
  • #3
cant really understand it.. can u explain it?
 
  • #4
Acceleration of a magnet? Interesting question, I would like to hear more.
 
  • #5
pratyushag said:

Homework Statement


because copper will oppose the relevant pole(im not sure why?)

what do you know about copper?

it is conductive and non-magnetic material.

if it has no magnetic attraction , then what is the force that acts on the magnet ?

this is when the LENZ's law comes in,

for your case , magnetic fields dropped through the copper loop (conductor) and induces electrical current, current in the conductor then generates an opposing magnetic field that causes "less than g" :-)

do you know what is eddy current?
 
Last edited:
  • #6
The changing magnetic flux will produce and emf in it. This will produce a current in the loop. Lenz's law state that the direction of the current will be such that the magnetic field that it produces will oppose the original magnetic flux that induced the emf.
 
  • #7
Got it thanks. Induced emf, neat.
 

1. What is acceleration of magnet?

Acceleration of magnet refers to the rate at which the velocity of a magnet changes over time. It is a measure of how quickly the magnet is speeding up or slowing down.

2. How is acceleration of magnet calculated?

The acceleration of a magnet can be calculated by dividing the change in its velocity by the change in time. This can be represented by the formula a = (vf - vi) / t , where a is acceleration, vf is final velocity, vi is initial velocity, and t is time.

3. What factors affect the acceleration of a magnet?

The acceleration of a magnet can be affected by several factors, including the strength of the magnetic field, the mass of the magnet, and the presence of other magnetic fields or materials nearby. The distance between the magnet and other objects can also impact its acceleration.

4. How does acceleration of magnet relate to its force?

The acceleration of a magnet is directly related to the force acting on it. According to Newton's Second Law of Motion, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Therefore, a stronger force will result in a greater acceleration of the magnet.

5. Can the acceleration of a magnet be negative?

Yes, the acceleration of a magnet can be negative. This means that the magnet is slowing down, either due to an opposing force or a decrease in the strength of the magnetic field. Just like with any other object, the acceleration of a magnet can be positive, negative, or zero.

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