The secondary voltage for a certain power transformer is twice the voltage applied to the primary. The current flowing in the secondary winding will be: A. One-half the primary current B. Same as the primary current C. Twice the primary current D. No more than 10% less than the primary current E. None of the above

The correct answer is: C. Twice the primary current.

A transformer is a device that transfers electrical energy from one circuit to another without a change in frequency. It does this by using electromagnetic induction to create a magnetic field in the secondary winding, which induces a voltage in the secondary winding. The ratio of the secondary voltage to the primary voltage is equal to the ratio of the number of turns in the secondary winding to the number of turns in the primary winding.

In this case, the secondary voltage is twice the primary voltage. This means that the number of turns in the secondary winding is twice the number of turns in the primary winding. The current flowing in the secondary winding is proportional to the voltage

divided by the resistance. Since the voltage is twice the primary voltage and the resistance is the same, the current flowing in the secondary winding is twice the primary current.

Option A is incorrect because the current flowing in the secondary winding is not one-half the primary current. Option B is incorrect because the current flowing in the secondary winding is not the same as the primary current. Option D is incorrect because the current flowing in the secondary winding is not no more

than 10% less than the primary current. Option E is incorrect because the current flowing in the secondary winding is not none of the above.