Which of the following statements is true about the magnetic field inside a sole

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Question: Which of the following statements is true about the magnetic field inside a solenoid? (2019)

Options:

Correct Answer: It is uniform and parallel to the axis

Exam Year: 2019

Solution:

Inside a long solenoid, the magnetic field is uniform and parallel to the axis of the solenoid, provided the solenoid is long enough.

Which of the following statements is true about the magnetic field inside a solenoid? (2019)

Which of the following statements is true about the magnetic field inside a solenoid? (2019)

Step 1: Understand what a solenoid is. A solenoid is a coil of wire that creates a magnetic field when an electric current passes through it.
Step 2: Recognize that the magnetic field is the area around the solenoid where magnetic forces can be detected.
Step 3: Learn that inside a long solenoid, the magnetic field lines are straight and evenly spaced, which means the field is uniform.
Step 4: Note that the direction of the magnetic field inside the solenoid is parallel to its length (the axis).
Step 5: Remember that this uniformity and direction only applies if the solenoid is long enough compared to its diameter.

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