The magnetic field at a point on the axis of a long solenoid having 5 turns per cm length when a current of 0.8 A flows through it is

Question

The magnetic field at a point on the axis of a long solenoid having 5 turns per cm length when a current of 0.8 A flows through it is (A)  5.024× 10-8 Wb/m2 (B)  6.024× 10-8 Wb/m2 (C)  7.024× 10-8 Wb/m2 (D)  8.024× 10-8 Wb/m2

Tardigrade Admin · Accepted Answer

B=μ0 n I Given, μ0=4 π × 10-7, n=5 cm, I=0.8 A B=5.024 × 10-8 Wb / m 2

Q. The magnetic field at a point on the axis of a long solenoid having $5$ turns per $c m$ length when a current of $0.8 A$ flows through it is

$5.024 \times 1 0^{- 8} Wb / m^{2}$

$6.024 \times 1 0^{- 8} Wb / m^{2}$

$7.024 \times 1 0^{- 8} Wb / m^{2}$

$8.024 \times 1 0^{- 8} Wb / m^{2}$

$B = μ_{0} n I$
Given, $μ_{0} = 4 π \times 1 0^{- 7},$
$n = 5 c m, I = 0.8 A$
$B = 5.024 \times 1 0^{- 8} Wb / m^{2}$

Q. The magnetic field at a point on the axis of a long solenoid having 5 turns per cm length when a current of 0.8A flows through it is

5.024×10−8Wb/m2

6.024×10−8Wb/m2

7.024×10−8Wb/m2

8.024×10−8Wb/m2