Question

A solinoid has 50cm long has 4 layers bounding of 350 terns the radious of lowest layer is 1.4cm if the current carried 6ampear estimate the magnitude of megnitic feild ,near the centre of solinoid, near the end of solinoid, outside the solinoid​

Answer 1

Answer:

Length of solenoid L=80cm=0.8m

Diameter of solenoid d=1.8cm

As d<<L, thus we can treat the solenoid as solenoid of infinite length w.r.t its diameter.

Current flowing through the solenoid I=8.0 A

Total number of turns N=5×400=2000 turns

Number of turns per unit length n=

L

N

∴ n=

0.8

2000

=2500

Magnetic field at the center of solenoid B=μ

o

nI

∴ B=4π×10

−7

×2500×8.0

We get B=2.5×10

−2

T