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प्रश्न
A portable radio has a built in transformer so that it can work from the mains instead of batteries. Is this a step up or step down transformer? Give reason.
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उत्तर
A step-down transformer is used in a portable radio in order to reduce the voltage.
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संबंधित प्रश्न
Draw a labelled diagram to show the various components of a step-up transformer.
Name the principal on which step up transformer works.
Draw a labelled diagram of a step-up transformer and explain how it works.
Give two points of difference between a step-up transformer and step-down transformer.
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.
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.
State whether the turns ratio of the above transformer is = 1 or > 1 or < 1.
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.
