A coil of 200 turns and area 0.01 m squared lies perpendicular to a field of 0.5 T. The flux linkage is
Correct answer: A. 1 weber
- A. 1 weber
- B. 0.005 weber
- C. 100 weber
- D. 0.5 weber
Explanation
The flux through one turn is BA, that is 0.5 multiplied by 0.01, giving 0.005 Wb, and the flux linkage multiplies this by the 200 turns to give 1 Wb. Forgetting the number of turns leaves the 0.005 distractor. Flux linkage rather than flux is what appears in Faraday's law for a coil.
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About Magnetic Flux
Magnetic flux measures the magnetic field passing through a surface, calculated for a uniform field as Φ = BA cos θ, where θ is the angle between the field and the surface normal. Questions involve area, field strength and orientation, the weber as its unit, and the distinction between flux and magnetic field.
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