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प्रश्न
Explain two types of transformer.
उत्तर
Transformer is a device used for converting low voltage into high voltage and high voltage into low voltage. It works on the principle of electromagnetic induction. It consists of primary and secondary coil insulated from each other. Depending upon the number of turns in the primary and secondary coils, the two types of transformers are; step-up or step-down transformers.
Step up and step down transformer.
- Step up transformer:
The transformer used to change a low alternative voltage to a high alternating voltage is called a step up transformer, ie (Vs > Vp) . In a step up transformer, the number of turns in the secondary coil is more than the number of turns in the primary coil (Ns > Np). - Step down transformer:
The transformer used to change a high alternating voltage to a low alternating voltage is called a step down transformer (Vs < Vp). In a step down transformer, the number of turns in the secondary coils are less than the number of turns in the primary
coil (Ns < Np).
The formulae pertaining to the transformers are given in the following equations.
- `"The number of primary turns N"_"p"/ "The number of secondary turns N"_"s" = "The primary voltage V"_"p"/ "The secondary voltage V"_"s"`
`"The number of secondary turns N"_"s"/"The number of primary turns N"_"P" – "The primary current I"_"p"/"The secondary current I"_"s"`
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संबंधित प्रश्न
Draw a labelled diagram to show the various components of a step-up transformer.
Draw a labelled diagram of a step-up transformer and explain how it works.
- Complete the following diagram of a transformer and name the parts labelled A and B.
- Name the part you have drawn to complete the diagram in part (a).
- What is the material of this part named above?
- Is this transformer a step up or step down? Give reason.
Name the coil of which the wire is thicker in a step up transformer. Give reason to your answer.
Name the transformer used in the power generating station and state the function of the transformer.
State whether true or false. If false, correct the statement.
In a step down transformer the number of turns in primary coil is greater than that of the number of turns in the secondary coil.
Differentiate step up and step down transformer.
A transformer is used to change a high alternating e.m.f. to a low alternating e.m.f. of the same frequency.
State whether the turns ratio of the above transformer is = 1 or > 1 or < 1.
Name the coil of which the wire is thicker in a step down transformer. Give reason to your answer.
The output current of a transformer in which the voltage is stepped down is usually higher than the input current. Explain why.
