Question

Which of the following statements are true?

*The magnetic field in the center line of a large solenoid is zero and increases toward the wires.
*The magnetic field inside a large solenoid is pointing perpendicularly toward or away from the center line, depending on the direction of the current.
*The magnetic field strength inside a large solenoid is independent of its cross-sectional area.
*The magnetic field of a current-carrying wire is directed parallel to the current.

Answer 1

Answer:The magnetic field strength inside a large solenoid is independent of its cross-sectional area.

Step-by-step explanation:

correct answer is "The magnetic field strength inside a large solenoid is independent of its cross-sectional area".

because magnetic field inside a solenoid is given by

`B=\mu _0n i`

where i=current in solenoid

also there is highest concentration of magnetic field at the center of solenoid