Two Parallel Wires, 4 Cm Apart, Carry Currents of 2

question 20

Multiple Choice

Two parallel wires, 4 cm apart, carry currents of 2 A and 4 A respectively, in opposite directions.The force per unit length of one wire on the other is:

• A)1 *10^-3 N/m, repulsive
• B)1 *10^-3 N/m, attractive
• C)4 * 10^-5 N/m, repulsive
• D)4 * 10^-5 N/m, attractive
• E)none of these

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Definitions:

EMI

Electromagnetic Interference, disturbances that affect an electrical circuit due to electromagnetic induction or radiation emitted from an external source.

Line Voltage Variations

Fluctuations in the electrical power supply voltage that can affect the performance of electrical devices.