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1.include working in your answers 1a) If a long wire is carrying a current of 5.5...

1.include working in your answers

1a) If a long wire is carrying a current of 5.5 A, how far away from the wire would the magnet field strength be 1.0E-5 T?

1b) A transformer is used to step down from the New Zealand mains voltage of 230 V to 110 V for use with an electric razor from the USA. (i) If the razor draws a current of 0.25 A what current (at least) is drawn from the 230 V line? (ii) What is the ratio of the loops in the primary and secondary coils of the transformer?

1c) A ball is dropped from a height of 2.2 m in a train travelling at 25 m/s and accelerating at 1 m/s2 . How far will the ball miss the spot directly below where it was dropped?

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genius_generous answered 2 years ago
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