Advertisements
Advertisements
Question
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
Solution
A step-down transformer is used in a portable radio in order to reduce the voltage.
APPEARS IN
RELATED QUESTIONS
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.
In a step-up transformer, the number of turns in the primary are ______ than the number of turns in the secondary.
Name the transformer used in the power generating station and state the function of the transformer.
Differentiate step up and step down 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.
State two characteristics of the primary coil as compared to its secondary coil of a step-up transformer.
Name the coil of which the wire is thicker in a step down transformer. Give reason to your answer.
