- #1
crosbykins
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Homework Statement
A coil with an iron coil is used as an electromagnet. With 500 loops and a current of 1.5A, it can exert a lifting force of 30N. What force would it be able to lift, if the following changes were made?
a) The current is increased to 3.0A.
b) The number of loops is increased to 750.
c) Both the above changes are made together.
Homework Equations
F = IBL
number of turns directly proportional to B
current is directly proportional to B
The Attempt at a Solution
-ok well the qs does not give the length of the coil, without that infor how is it possible to find force...please help