A solenoid is constructed by winding an insulated copper on a long test tube. A constant direct current is passed through the solenoid. Which of the following actions will not increase the strength of the magnetic field of the solenoid? Inserting a
a
steel rod in the test tube
b
Nickel rod in the test tube
c
Brass rod in the test tube
d
Soft iron rod in the test tube
Explanation
Correct Option
cVideo Explanation
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