The magnetic field inside a solenoid having 100 turns per cm and a current of 5.0 A is A) 2.0 × 10⁻² T. B) 1.0 × 10⁻² T. C) 1.0 × 10⁻⁴ T. D) 6.3 × 10⁻⁴ T. E) 6.3 × 10⁻² T.

Question

Quizplus · Accepted Answer

The magnetic field inside a solenoid is given by the formula: 
B = μ₀nI  
Where μ₀ is the permeability of free space, n is the number of turns per unit length, and I is the current passing through the solenoid.

Substituting the given values in the formula, we get: 
B = (4π × 10^-7 T m/A) × 100 turns/cm × 5.0 A 
B = 2π × 10^-3 T

Therefore, the magnetic field inside the solenoid is 6.3 × 10^-2 T or 6.3 × 10^-2 Tesla or 6.3 × 10^-2 Weber/m². 
The correct answer option is E which gives the magnetic field value in Tesla.

The Magnetic Field Inside a Solenoid Having 100 Turns Per