# Physics question Need help

Watch
Announcements
#1
So im stuck on this question and how to actually do it

When a magnet is moved into a coil of 50 turns at 0.12m/s an emf of 3.6V is generated in the coil.What will be the emf generated when the magnet is removed from the coil at 0.48 m/s
0
10 months ago
#2
According to Faraday's law of electromagnetic induction, magnitude of induced emf is directly proportional to the rate of change of magnetic flux linked with the circuit. So, emf is directly proportional to the speed of the magnet traveling through the coil.
N (number of turns) is known as the constant of proportionality - doesn't change.

Sooooo... to get from 0.12m/s to 0.48m/s you have to multiply by 4. Hence your answer is 3.6(4)
0
X

new posts
Back
to top
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### Poll

Join the discussion

#### Feeling behind at school/college? What is the best thing your teachers could to help you catch up?

Extra compulsory independent learning activities (eg, homework tasks) (18)
7.38%
Run extra compulsory lessons or workshops (37)
15.16%
Focus on making the normal lesson time with them as high quality as possible (44)
18.03%
Focus on making the normal learning resources as high quality/accessible as possible (35)
14.34%
Provide extra optional activities, lessons and/or workshops (63)
25.82%
Assess students, decide who needs extra support and focus on these students (47)
19.26%