(a) A pair of wires carry 10 A of current to and from a toaster in...
(a) A pair of wires carry 10 A of current to and from a toaster
in your kitchen. The wires are separated by 2 mm of insulation.
What is the force per unit length between them (magnitude and
direction)?
(b) A 10 cm long solenoid is made of 3 layers of wire, each wound
tightly at 10 wraps per cm. What is the B-field down the
center of it if you run a 5 A current into it?
(c) A 10 cm radius coil made from 100 turns of copper-wound CW lies
in front of you flat on the desk. If you measure a 10 mA current in
it, what is the B-field at its center (magnitude and
direction)?
Homework Answers
(a) The force per unit lenght is given by:
Since the currents have the same direction, the force between the wires is atractive
(b) The B field down the center is:
(c) The B field at the center is:
Add Answer to:
(a) A pair of wires carry 10 A of current to and from a toaster
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