Dropping a closed loop into a magbetic field

[sgstudent]

Homework Statement

The closed loop is vertical and the magnetic field is a north and south pole such that the looped end faces the magnetic poles.


A multiple choice question answer stated that the closed loop will have a smaller acceleration than 10mls

^2 as it would experience an opposing force. But if I look at it closely, won't the 2 induced force cancel each other so it will accelerate at 10m/s^2?

Homework Equations

None

The Attempt at a Solution

My explanation goes like this: when it is dropped into the magnetic field, it experiences a change in magnetic flux linkage and thus there would be a current induced induced it. since there is a current flowing perpendicular to the magnetic field, by Fleming left hand rule there will be 2 forces acting on the closed loops at the two edges there are equal and opposite. Hence, this cancels out the force which allows the downwards acceleration to be still 10m/s^2.


Is there something wrong with my concept here? It seems correct to me though. I hope you guys can answer me as soon as possible cos tomorrow is my physics O level paper thanks for the help!

 

[bsbs]

Homework Statement

The closed loop is vertical and the magnetic field is a north and south pole such that the looped end faces the magnetic poles.


A multiple choice question answer stated that the closed loop will have a smaller acceleration than 10mls

^2 as it would experience an opposing force. But if I look at it closely, won't the 2 induced force cancel each other so it will accelerate at 10m/s^2?

Homework Equations

None

The Attempt at a Solution

My explanation goes like this: when it is dropped into the magnetic field, it experiences a change in magnetic flux linkage and thus there would be a current induced induced it. since there is a current flowing perpendicular to the magnetic field, by Fleming left hand rule there will be 2 forces acting on the closed loops at the two edges there are equal and opposite. Hence, this cancels out the force which allows the downwards acceleration to be still 10m/s^2.


Is there something wrong with my concept here? It seems correct to me though. I hope you guys can answer me as soon as possible cos tomorrow is my physics O level paper thanks for the help!

do you have the answer since it's a MCQ?

Lenz's law?

 

[sgstudent]

do you have the answer since it's a MCQ?

Lenz's law?

The answer is that the acceleration is less than 10m/s^2. But since they cancel out so shouldn't it be 10m/s^2?

 

[bsbs]

Read about lenz's law about opposing induced force. It satisfied the answer and in actual fact, they do not cancel out.

 

[sgstudent]

Read about lenz's law about opposing induced force. It satisfied the answer and in actual fact, they do not cancel out.

Why won't they cancel out? Since the current is the same at both ends?