Q. 65.0( 2 Votes )
Four metal rods are placed, in turn, inside a coil of copper wire,
The table below gives the results of the experiment. Which rod would be the most suitable to use for the case of a coil in a circuit breaker?
The core of solenoid must be of some soft type magnetic material which can be strongly magnetized but does not retain induced magnetism.
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The directions of current flowing in the coil of an electromagnet at its two ends X and Y are as shown below:
(a) What is the polarity of end X?
(b) What is the polarity of end Y?
(c) Name and state the rule which you have used to determine the polarities.Lakhmir Singh & Manjit Kaur - Physics
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