Advertisements
Advertisements
प्रश्न
What is the turns ratio i.e., transformer ratio, ns: np, in an ideal transformer which in-creases ac voltage from 220 V to 33000 V?
Advertisements
उत्तर
`"n"_s/"n"_p = "E"_s/"E"_p = 33000/220 = 150`
APPEARS IN
संबंधित प्रश्न
State the principle of transformer working with the help of a diagram
You are required to make an electromagnet from a soft iron bar by using a cell, an insulated coil of copper wire and a switch. (a) Draw a circuit diagram to represent the process. (b) label the poles of the electromagnet.
Can a transformer be used with direct current source? Give reason.
Name three losses of energy in a transformer. How are they minimized?
State whether true or false. If false, correct the statement.
A transformer can step up direct current.
For an ideal step-down transformer, the quantity which is constant for both the coils is ______.
Read the following paragraph and answer the question:
Long distance power transmissions
The large-scale transmission and distribution of electrical energy over long distances is done with the use of transformers. The voltage output of the generator is stepped up. It is then transmitted over long distances to an area sub-station near the consumers. There the voltage is stepped down. It is further stepped down at distributing sub-stations and utility poles before a power supply of 240 V reaches our homes.
We need to step-up the voltage for power transmission, so that ______.
A transformer is used ______
The primary coil of a transformer has 60 turns whereas its secondary coil has 3000 turns.
If a 220 V ac voltage is applied to the primary coil, how much emf is induced in the secondary coil?
For what purpose are the transformers used?
