A long solenoid has 200 turns per cm and carries a current of 2.5 A. The magnetic field at the center is (μ0=4 π × 10-7 Wb / m - A )

Question

A long solenoid has 200 turns per cm and carries a current of 2.5 A. The magnetic field at the center is (μ0=4 π × 10-7 Wb / m - A ) (A) 5.41 × 10-3 Wb / m 2 (B) 6.28 × 10-2 Wb / m 2 (C) 2.2 × 10-4 Wb / m 2 (D) None of these

Tardigrade Admin · Accepted Answer

B =μ o nI =4 π × 10-7 × (200/10-2) × 2.5 B =6.28 × 10-2 Wb / m 2

Q. A long solenoid has 200 turns per $c m$ and carries a current of $2.5 A .$ The magnetic field at the center is $(μ_{0} = 4 π \times 1 0^{- 7} Wb / m - A)$

$5.41 \times 1 0^{- 3} Wb / m^{2}$

$6.28 \times 1 0^{- 2} Wb / m^{2}$

$2.2 \times 1 0^{- 4} Wb / m^{2}$

None of these

$B = μ_{o} n I = 4 π \times 1 0^{- 7} \times \frac{200}{1 0 ^{- 2}} \times 2.5$
$B = 6.28 \times 1 0^{- 2} Wb / m^{2}$

Q. A long solenoid has 200 turns per cm and carries a current of 2.5A. The magnetic field at the center is (μ0​=4π×10−7Wb/m−A)

5.41×10−3Wb/m2

6.28×10−2Wb/m2

2.2×10−4Wb/m2