The emf developed in a coil X due to the current in a neighboring coil Y is proportional to the:
Correct answer: C. rate of change of magnetic field in X
- A. thickness of the wire in X
- B. resistance of X
- C. rate of change of magnetic field in X
- D. all of the above
Explanation
According to Faraday's law of electromagnetic induction, the electromotive force (EMF) induced in a coil is proportional to the rate of change of magnetic field. Mathematically, it is expressed as EMF = -dΦ/dt, where Φ is the magnetic flux. In this case, the rate of change of magnetic field in coil X is the determining factor.
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About Electromagnetism
Magnetic flux density and magnetic flux describe the strength of a magnetic field and the field passing through a surface. A charged particle moving through a magnetic field experiences a force perpendicular to its velocity and may follow circular or helical motion, depending on the angle between velocity and field.
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