हिंदी

What Type of Current is Transmitted from the Power Station?

Advertisements
Advertisements

प्रश्न

What type of current is transmitted from the power station?

Advertisements

उत्तर

An alternating current is transmitted from the power station.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
2015-2016 (March) Science Paper 1

संबंधित प्रश्न

Explain the construction and working of the transformer. 


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.


The adjacent diagram shows a coil would around a soft iron bar XY. (a) State the polarity at the end X and Y as the switch is pressed. (b) Suggest one way increasing the strength of electromagnet so formed.


State two ways through which the strength of an electromagnet can be increased.


The following diagram in Fig. 10.44 shows a coil X connected to a sensitive centre –zero galvanometer G and a coil P connected to a battery through a switch S.

(a) Describe the observation when the switch S is (i) closed suddenly, (ii) then kept closed, (iii) finally opened.
(b) Name and state the law which explains the above observations.


For what purpose are the transformers used? Can they be used with a direct current source?


The input and output voltage of a transformer are 220 V and 44 V respectively. Find:  the turns ratio.


An a.c generator generates an emf 'ε' where ε = 314 Sin (50πt) volt. Calculate the frequency of emf ε.


Name the principle on which functioning of a transformer depends.


The self-inductance of a closely wound coil of 200 turns is 10 mH. Determine the value of magnetic flux through the cross-section of the coil when the current passing through the coil is 4 mA.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×