A 460-turn solenoid of length 30.0 cm and radius 4.00 cm carries a current of 3.50 A. What is the magnetic field strength inside the coil at its midpoint? What is the magnetic field strength inside the coil at its midpoint?

Magnetic field at the mid point of coil is 6.74 x 10⁻³ T

Explanation:

Given :

Current flowing through the solenoid, I = 3.50 A

Length of the solenoid, L = 30 cm = 0.3 m

Number of turns in the solenoid, N = 460

Magnetic field inside the coil at its mid point is given by the relation:

B = μ₀nI    ...(1)

So, equation (1) becomes:

Substitute the suitable values in the above equation.

B = 6.74 x 10⁻³ T

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles