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प्रश्न
Give two points of difference between a step-up transformer and step-down transformer.
उत्तर
| Step up transformer | Step down transformer |
| It increases the a.c. voltage and decrease the current. | It decreases the a.c. voltage and increase the current. |
| The wire of primary coil is thicker than that in the secondary coil. | The wire in the secondary coil is thicker than that in the primary coil. |
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संबंधित प्रश्न
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.
In a step up transformer ______.
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.
Explain two types of transformer.
The transformation ratio in the step-up transformer is ______
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.
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.
