An investigator has made a solenoid by wrapping 100 turns of wire on a tube that is 10 cm long and 2 cm in diameter. The power supply is providing as much current as it can, but a stronger field is needed, so the solenoid must be rewrapped. Which of the following will result in a stronger field?A. Wrapping 100 turns of wire on a tube that is 20 cm long and 2 cm in diameter.B. Wrapping 100 turns of wire on a tube that is 10 cm long and 1 cm in diameter.C. Wrapping 100 turns of wire on a tube that is 5 cm long and 2 cm in diameter.

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A: Option B is correct as explained in the image attatched.

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A: N= no. of turn= 1 B(magnetic field)=2.9 T side(a)= 3.4 x10-2m

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Magnetic Force

A magnetic force arises when a charged particle or a current-carrying conductor is placed in a magnetic field. It is created because of the movement of the charged particles.