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PRS:~ Loop Below Magnet
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A conducting loop is below a magnet and moving
~ds. This induces a current as pictured. The
I ds x B force on the coil is ""--
Do/.
Do/.
Do/.
(]) Up
2. Down
3. Zero
ru PRS: Loop in Uniform Field
B o ,, 0 0 000 000
000E!f-' · 00
00000·00
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A rectangular wire loop is pulled thru a uniform B field
penetrating its top half. as shown. The induced
current and the force and torque on the loop are:
~. ill Current CWo Force Left. No Torque
~ 2. Current CWo No Faroe. Torque Rotates CCW
" 3. Current CCW. Force Left, No Torque
f. D4. Current CCW. No Force. Torque Rotates CCW
!'h • No current, force or torque
, . PRS:
A coil moves up
from underneath a
magnet with its
north pole pointing
upward. The
current in the coil
and the force on the
coil:
0-.4 1. Current clockwise; force up
0% 2. Current counterclockwise; force up
O%Q) Current clockwise; force down
O% ~ Current counterclocltwise; force down
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