In a step-down transformer, the _ is decreased in secondary coils.
Correct answer: C. Number of turns
- A. Electric field
- B. Magnetic field
- C. Number of turns
- D. None of these
Explanation
In a step-down transformer, the primary coil has more turns than the secondary coil. This means that the voltage in the primary coil is higher than the voltage in the secondary coil. By the law of conservation of energy, since the power output must equal the power input, the current in the secondary coil must be higher than the current in the primary coil. Therefore, the number of turns is decreased in the secondary coil to compensate for the increase in current and maintain the power output.
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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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