Which of the following statements is true regarding the magnetic field due to a

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Question: Which of the following statements is true regarding the magnetic field due to a solenoid? (2023)

Options:

Correct Answer: It is uniform inside and zero outside

Exam Year: 2023

Solution:

A solenoid produces a uniform magnetic field inside and negligible field outside when it is long compared to its diameter.

Which of the following statements is true regarding the magnetic field due to a solenoid? (2023)

Which of the following statements is true regarding the magnetic field due to a solenoid? (2023)

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: Know that the magnetic field is strongest inside the solenoid. This means that inside the solenoid, the magnetic field lines are close together and uniform.
Step 3: Recognize that when the solenoid is long compared to its diameter, the magnetic field inside is uniform and consistent throughout.
Step 4: Learn that outside the solenoid, the magnetic field is very weak or negligible. This means that the magnetic field does not extend far outside the solenoid.
Step 5: Conclude that the statement about the solenoid producing a uniform magnetic field inside and negligible field outside is true when the solenoid is long compared to its diameter.

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