List inner planets and outer planets
2 answers:
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Answer:
We can increase the strength by increasing current in the wire or increasing the number of turns of the coil around an iron core .
Explanation:
The magnetic strength due to current carrying conductor carrying current I and having N number of turns is given by
B =
is vacuum permeability .and its value is equal to
.so from the above equation we can see that magnetic strength is directly proportional to the current through wire and no. of turns .