Peoples Physics Concepts

14.4. Electromagnetic Induction http://www.ck12.org

d=vt

t=

d

v

t=

2 ∗.25 m

2 m/s

t=.25 s

Now we can find the induced Emf in the loop.

Em f=

∆Φ

∆t

Em f=

.98 Tm^2 −0 Tm^2

.25 s

Em f= 3 .92 V

(b): There will be no inuduced Emf in the loop once the entire loop is inside the magnetic field because the

magnetic flux will not be changing.

(c): As the loop exits the magnetic field, the induced Emf will have the same magntiude as when it entered the field
except that this time it will be negative because the flux is decreasing.

Em f=− 3 .92 V

Watch this Explanation

MEDIA

Click image to the left for use the URL below.

URL: http://www.ck12.org/flx/render/embeddedobject/328

MEDIA

Click image to the left for use the URL below.

URL: http://www.ck12.org/flx/render/embeddedobject/3627