Energy losses through eddy currents are reduced... - JAMB Physics 2001 Question
Energy losses through eddy currents are reduced by using
A
low resistance wires
B
insulated soft iron wires
C
few turns of wires
D
high resistance wires
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Correct Option: B
Eddy currents are unwanted circulating currents induced in a conductor when the conductor experiences a changing magnetic field. These currents cause energy losses in the form of heat. To reduce these losses:
- Insulated soft iron wires: Using insulated soft iron wires creates a laminated core. This lamination increases the resistance to the flow of eddy currents, thus reducing their magnitude and the associated energy losses.
- Low resistance wires and High resistance wires: The resistance of the wire isn't the primary factor to reduce the energy loss.
- Few turns of wires: The number of turns isn't the primary factor to reduce the energy loss.
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