When in a coil the current changes from + 5A to - 5A in 0.04 second, then 4 V emf is induced in a coil. The coefficient of self-induction of the coil will be:
Correct answer: A. 0.016 H
- A. 0.016 H
- B. 0.29 H
- C. 0.4 H
- D. 0.80 H
Explanation
e = L di/dt ⇒ 4 = L × (5 − (−5)) / 0.04 ⇒ L = 0.016 H
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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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