The best material for the core of the primary and seconda...
The best material for the core of the primary and secondary coils of an induction coil is
copper, because it has a good conductor of electricity
steel, because it becomes magnetic and retains its magnetism for a long time
rubber, because it is a good insulator and the user is prevented from shock
soft iron, because it becomes magnetic but easily loses its magnetism
glass, because it is transparent
Correct answer is D
No explanation has been provided for this answer.
The absolute temperature of a perfect gas is proportional to the average ...
Which of the following is/are necessary for the production of interference with two wave trains? ...
Which of the following statement about viscosity is not true? it ...
Which of the following substances lowers the surface tension of water? ...
All of the following frequencies are overtones of 320 Hz EXCEPT ...
The image which cannot be formed on a screen is said to be ...
Dewpoint is the temperature at which, water vapour in the atmosphere ...
Which of the following is/are TRUE of nuclear fission? I. A heavy nucleus is split into two nucl...