NDA 2019 Physics question
Consider the following statements about a solenoid : 1. The magnetic field strength in a solenoid depends upon the number of turns per unit length in the solenoid 2. The magnetic field strength in a solenoid depends upon the current flowing in the wire of the solenoid 3. The magnetic field strength in a solenoid depends upon the diameter of the solenoid Which of the statements given above are correct ?
Answer: (D)
Solution
Inside a long solenoid , where is the number of turns per unit length and the current. The
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