A metal rod of length 4 m, velocity 5 m/s and magnetic field 0.5 T will have an induced EMF of:
Correct answer: A. 10 V
- A. 10 V
- B. 20 V
- C. 30 V
- D. 4 V
Explanation
Induced EMF = E = B v l where E is the induced EMF, B is the magnetic flux density, v is the speed and l is the length of the rod. Subsituting the information provided in the question: E = 0.5 x 5 x 4 = 10 V
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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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