Physics · Magnetic Effects of Current
A hairpin-like shape is made by bending a long current-carrying wire into two parallel straight sections and a semi-circular loop of radius r. What is the magnitude of the magnetic field at point P, which lies at the center of the semicircle?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1μ0I4πr(2 - π)
- 2μ0I4πr(2 + π)✓
- 3μ0I2πr(2 + π)
- 4μ0I2πr(2 - π)
Correct answer
μ0I4πr(2 + π)
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