For a 100% efficient step down transformer
Correct answer: C. input power is same as the output power
- A. voltage in primary and secondary are equal
- B. current in primary and secondary are equal
- C. input power is same as the output power
- D. output power is zero
Explanation
If it is assumed that a transformer is 100% efficient then the power in the primary coil has to be equal to the power in the secondary coil, as per the law of conservation of energy.
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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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