The current in the primary coil of a transformer is 2.5A. If the coil has 50 turns and the secondary 250 turns, What is the current in the secondary coil? Neglect energy losses in the transformer
A. 0.2A
B. 0.5A
C. 2.5A
D. 5A
E. 12.5A
Correct Answer:
Option B – 0.5A
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![It takes 4 minutes to boil a quantity of water using an electrical heating coil. How long will it take to boil the same quantity of water using the same coil if the current is doubled? [Neglect any external heat losses]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "It takes 4 minutes to boil a quantity of water using an electrical heating coil. How long will it take to boil the same quantity of water using the same coil if the current is doubled? [Neglect any external heat losses]")