Physics · Magnetic Field
An infinitely long straight wire carrying current I is bent in a planar shape as shown in the diagram. The radius of the circular part is r. The magnetic field at the centre O of the circular loop is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1(\mu0 / 2 π) (I / r)(π+1) i
- 2-(\mu0 / 2 π) (I / r)(π-1) i✓
- 3(\mu0 / 2 π) (I / r)(π-1) i
- 4-(\mu0 / 2 π) (I / r)(π+1) i
Correct answer
-(\mu0 / 2 π) (I / r)(π-1) i
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