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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.
- 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.
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.
Name the device used to transform 12 V a.c. to 200 V a.c.
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.
