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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.
उत्तर
A step-down transformer is used in a portable radio in order to reduce the voltage.
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संबंधित प्रश्न
In a step-up transformer, the number of turns in the primary are ______ than the number of turns in the secondary.
In a step up transformer ______.
Name the coil of which the wire is thicker in a step up transformer. Give reason to your answer.
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.
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.
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.
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.
