For an 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
A step-up transformer is one that increases voltage, whereas a step-down transformer decreases voltage.Assuming, as we have, that resistance is negligible, the electrical power output of a transformer equals its input.
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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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