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A transformer has 490 turns in the primary coil and 140 in the secondary coil. Part...

A transformer has 490 turns in the primary coil and 140 in the secondary coil.

Part A

What kind of transformer is this?

A. step-up

B. step-down

Part B

By what factor does it change the voltage? Assume 100% efficiency.

Part C

By what factor does it change the current?

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Answer #1

N 490 X, = 140 Part A This is a step -down transfomer Part B V. N. 140 s = 0.286 ї, X, 490 The percentage change in voltage 2

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