Advertisements
Advertisements
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.
Advertisements
उत्तर
A step-down transformer is used in a portable radio in order to reduce the voltage.
APPEARS IN
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.
Give two points of difference between a step-up transformer and step-down transformer.
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.
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.
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.
