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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.
Give two points of difference between a step-up transformer and step-down transformer.
In a step up transformer ______.
Name the transformer used in the power generating station and state the function of the transformer.
Below is the diagram of a transformer:
- Identify the type of transformer.
- In this type of transformer which of the wire is thicker, the primary or the secondary? Give a reason.
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 device used to transform 12 V a.c. to 200 V a.c.
State two characteristics of the primary coil as compared to its secondary coil of a step-up transformer.
The output current of a transformer in which the voltage is stepped down is usually higher than the input current. Explain why.
Name the tranformer used in the power sub-station, state the function of each transfomer.
