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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
Name the principal on which step up transformer works.
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.
- 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.
Give two points of difference between a step-up transformer and step-down 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.
Explain two types of transformer.
The transformation ratio in the step-up transformer is ______
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 tranformer used in the power sub-station, state the function of each transfomer.
