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प्रश्न
Draw a labelled diagram of a device you would use to transform 200 V a.c. to 15 V a.c. Name the device and explain how it works. Give its tow uses.
उत्तर
The device is step down transformer.
Working: In a stepdown transformer, the number of turns in secondary coil are less than the number of turns in the primary coil i.e., turns ratio n<1 or NS/NP<1.
As `"E"_"s"/"E"_"p" = "N"_"S"/"N"_"P"`.
So `"E"_"s"/"E"_"p"` < 1 which means Es is less than Ep.
Two uses of step down transformer are:
- With electric bells.
- At the power sub-stations to step-down the voltage before its distribution to the customers.
APPEARS IN
संबंधित प्रश्न
The following diagram shows the core of a transformer and its input and output connections.
- State the material used for core and describe its structure.
- Complete the diagram of the transformer and connections by labelling all parts joined by you.
- Name the transformer: step-up or step down?
In a step up transformer ______.
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.
Differentiate step up and step down transformer.
Explain two types of transformer.
Define 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.
Identify the type of transformer used for the above purpose.
State two characteristics of the primary coil as compared to its secondary coil of a step-up transformer.
Name the tranformer used in the power sub-station, state the function of each transfomer.
