Choose the correct option. The magnetic Meld inside a long straight solenoid-carrying current (a) is zero. (b) decreases as we move towards its end. (c) increases as we move towards its end. (d) is the same at all points.
The correct option is D is the same at all points The explanation for the correct option: Option(D): A coil of many circular turns of insulated copper wire wrapped closely in a cylinder's shape is generally known as a solenoid. One end of the solenoid basically acts as a magnetic north pole whereas the other acts as a magnetic south pole. The field lines inside the solenoid are known to be parallel and straight. The magnetic field inside a long straight solenoid-carrying current is generally the same at all points inside a magnetic field. The formula for the field inside the solenoid is B=μ0IN/L where B is the magnetic field, N is the number of turns in the solenoid, Iis the current in the coil, L length of the coil. From the above formula, we can say that solenoid is dependent on the number of turns N, length, and magnetic field.
