**Question1**

A step-up transformer has 270 turns on its primary coil and 90,000 turns on its secondary coil. The EMF of the generator to that the primary circuit is attached is 60.0 V.

a) what is EMF in the secondary circuit.

b) The current in a secondary circuit is 0.50 A. What current is in a primary circuit?

**Question2**

A hanging wire has a length of 1.90. When a steel ball of mass 57.0 is suspended from the wire, the wire stretches by 1.90 if the ball is pulled down a small additional distance and released, at what frequency will it vibrate? Suppose that tension on the wire is less than proportional limit.

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