In a step-down transformer:(a) number of turns in primary coil are less than the secondary coil.(b) the primary and secondary coils are wound on separate steel cores(c) number of turns in primary coil are more than the secondary coil.(d) number of turns in primary coil are equal to the secondary coil

In an ideal transformer, what is the relationship between the number of turns in the primary coil (N1) and the number of turns in the secondary coil (N2)?a.N1 < N2b.N1 = N2c.No relationshipd.N1 > N2

The diagram below represents a voltage step-down transformer with 1000 turns on the primary coil and 100 turns on the secondary. The primary is connected to a 10 V AC supply and a 10 Ω resistor is connected across the secondary. You may assume that the transformer is ideal, i.e. there are no flux or other losses. The current flowing in the primary circuit is to one decimal place in mA:

1. If the secondary of a transformer has twice as many turns as the primary, is the secondary voltage lower than the primary voltage? 2. What are the essential parts of a transformer? Give the role that each of them plays? 3. What are the essential parts of an alternator? Give the role that each of them plays? 4. Name the sources of losses in a transformer? 5. Name the sources of losses in an alternator? 6. While repairing a transformer, a few turns were removed from the secondary winding. What's going to happen ? 7. An ideal transformer is a transformer with no primary or secondary windings. True or false ? Justify your answer ? 8. We consider an ideal transformer fed at the primary by a sinusoidal alternating voltage. • Its yield is equal to 1? True or false ? Justify your answer • Its transformation ratio is equal to 1? True or false ? Justify your answer • Show, by means of a diagram, how to connect three single-phase transformers in star-delta and star-zigzag? 9. Name one processes from which an electromotive force can arise in a conductor?

All of the following statements about transformers are true, except:Group of answer choicesTransformers have two coil windings.Transformers can convert low voltage to high voltage.Transformers can convert high amperage to low amperage.Transformers only operate if the input current stays the same.

The number of turns in the primary and secondary coils of a transformer are 5 and 10 respectively. The mutual inductance is 25 H. If the number of turns in the primary and secondary coils are changed to 10 and 5 respectively, then the mutual inductance (in henry) will be :-6.2512.52550