Which of the following statements about an electromagnet ...
Which of the following statements about an electromagnet is not correct?
it is a temporary magnet
its strength depends on the current
its stength depends on the number of turns in its coil
it has permanent poles
Correct answer is D
properties of an electromagnet include, 1) its strength depends on current and the number of turns in the coil,2) it is temporary, 3)it does not have permanent poles, and 4) its direction of flow is determined by the direction of current flowing through the coil.
Stars which appear single to the naked eye but are double when seen through a telescope are ...
What is X in the equation given below? 42He + 94Be → 126C + X ...
Local actions is normally prevented in a simple electric cell by ...
The inner diameter of a test tube can be measured accurately using a? ...
The area under a force-time graph represents-------- ...
Bohr’s atomic model proves most successful for the explanation of the. I. structure of the ...
A magnetic needle is suspended first at the earth's north magnetic pole and then at a point on t...