Question

Which of the following is/are correct about a step-up transformer?

• A. Secondary voltage is more than primary voltage.
• B. Primary voltage is more than secondary voltage.
• C. Number of turns in primary coil is more than secondary coil.
• D. Number of turns in secondary coil is more than primary coil.

Answer 1

Answer: (A), (D)

The correct options are
A Secondary voltage is more than primary voltage.
D Number of turns in secondary coil is more than primary coil.

In a step-up transformer, the induced voltage across the secondary coil is greater than the applied voltage across the primary coil. Since the voltage is directly proportional to the number of turns in the coil, the secondary side will always have more number of turns, for the transformer to be of the step-up kind.