JAMB Physics 2007 Objective — Question 24
Question 24 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2007 Objective paper, with the correct answer and a full explanation.
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Two long parallel wires X and Y carry currents 3A and 5A respectively. If the force experienced per unit length by wire X is 5x10^-5N, the force per unit length experienced by wire Y is
- A. 5x10^-4N
- B. 3x10^-6N
- C. 3x10^-3N
- D. 5x10^-5NCorrect
Explanation
By Newton's third law, the force per unit length on each wire is equal in magnitude, so wire Y also experiences 5x10^-5N per unit length.
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