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CUET

Q12. Which of the following statements are collect about transformers? A. Transformers cannot be used to step up DC. B. The frequency of output across the secondary is always equal to the frequency of input across the primary. C. The output power of a transformer may be increased to a value which is more than the input power. D. Transformation ratio is equal to turns ratio. E. In a step-up transformer, secondary current is less than primary current. Choose the correct answer from the options given below: (a) A, B, C (b) B, C, D (c) C, D, A (d) A, B, D, E