Physics · Magnetic Effects of Electric Current
Three long straight parallel wires P, Q, and R carry currents of 2 A, 4 A, and 6 A respectively in the same direction. Wire Q is placed midway between wire P and wire R, with a distance of 10 cm separating P and Q, and 10 cm separating Q and R. The magnitude and direction of the net magnetic force experienced by a 15 cm length of wire Q is (μ0 = 4π × 10-7 T·m/A):
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 16 × 10-6 N towards P
- 26 × 10-7 N towards R
- 36 × 10-6 N towards R✓
- 46 × 10-7 N towards P
Correct answer
6 × 10-6 N towards R
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