For an ideal transformer:

Explanation

For an ideal transformer, the principle of power conservation is paramount, which states that the power input (Pin) equals the power output (Pout). This is because an ideal transformer is characterized by no energy losses, allowing for complete transfer of electrical power from the primary coil to the secondary coil. The relationship can be summarized as:Pin = PoutIn contrast, the other options suggest incorrect relationships:Option B incorrectly states that Pin is less than Pout, which is not true for an ideal transformer.Option C claims that Pin is greater than Pout, which also contradicts the power conservation principle.Option D presents an invalid multiplication of power terms, failing to represent the correct power relationship in transformers.Thus, the only valid statement for the ideal transformer is that the input power equals the output power.