Question

Which of the following statements about step-up transformers is true?

• A. Secondary coil has fewer turns than the primary coil
• B. Voltage in the secondary coil is smaller than the voltage in the primary coil
• C. Power output of the secondary coil is smaller than that of the primary coil
• D. Current in the secondary coil is smaller than the current in the primary coil

Answer 1

The correct option is D Current in the secondary coil is smaller than the current in the primary coil

In step up transformer:
1) Number of coil in primary is less than number of coil in secondary,
2) Voltage in secondary is more than voltage in primary coil
3) Current in the secondary coil is smaller than the current in the primary coil
4) No change in output and input power.