A transformer with Np = 20 and Ns = 30, what is the transformer ratio (a = ?) a. 25 b. No right answer O c. 1.5 d. 0.2

The cross-sectional area of a transformer limb is 80 cm² and the volume of the transformer core is 5000 cm³. The maximum value of the core flux is 10 mWb at a frequency of 50 Hz. Taking the Steinmetz constant as 1.7, the hysteresis loss is found to be 100 W. Determine the value of the hysteresis loss when the maximum core flux is 8 mWb and the frequency is 50 Hz.

A recording studio put in an isolation transformer to keep hums and buzzes down in the recorded audio. What's the turns ratio in this transformer? A. 21 B. Can be any ratio C.11 D. 12

What is an electrical transformer? Discuss basic principles of operation and applications of electrical transformers. Can you relate electromagnetic induction to the operation a transformer?