A level physics Magnetic fields question (3)

1234kelly

Can someone please help explain why the answer is D and not the others as well ?

(edited 1 year ago)

Reply 1

Eimmanuel

Study Forum Helper

Original post by 1234kelly

Can someone please help explain why the answer is D and not the others as well ?

It would be better that you explain your thoughts so that we can "target" what is wrong with your concepts instead of just explaining the correct reasons.
Hint: Think about the speed of the coil in the different options.

Reply 2

1234kelly

Original post by Eimmanuel

-for this question I assumed that the speed of the coil falling remains the same because I didn't see any reason why it would be accelerating?
-therefore using faradays law as induced emf= rate of change of magnetic flux = BA/t
I used the idea that at C the A would be largest and the B/t would remain constant for all so C would be the maximum ?

Reply 3

Eimmanuel

Study Forum Helper

Original post by 1234kelly

Can someone please help explain why the answer is D and not the others as well ?

Original post by 1234kelly

I didn't see any reason why it would be accelerating?

If you drop an object from a height, does the object fall at constant velocity?

Reply 4

Yerffoeg

Original post by 1234kelly

Can someone please help explain why the answer is D and not the others as well ?

Where are field lines most dense ? where are they less dense? Ask yourself where the greatest change of flux is happening, & what the rate of change of flux actually causes.