A solenoid 1.5 m long and 0.4 cm in diameter possesses 10 turns per cm length. A current of 5 A falls through it. The magnetic field at the axis inside the solenoid is

Question

A solenoid 1.5 m long and 0.4 cm in diameter possesses 10 turns per cm length. A current of 5 A falls through it. The magnetic field at the axis inside the solenoid is (A)  2π × 10-3T  (B)  2π × 10-5T  (C)  2π × 10-2T  (D)  2π × 10-3T

Tardigrade Admin · Accepted Answer

Magnetic field at the axis inside the solenoid B=μ 0ni Here, n=10 text turns/cm=1000 text turns/m,i=5A ∴ B=4π × 10-7× 1000× 5 =2π × 10-3T

Q. A solenoid 1.5 m long and 0.4 cm in diameter possesses 10 turns per cm length. A current of 5 A falls through it. The magnetic field at the axis inside the solenoid is

$2 π \times 10^{- 3} T$

$2 π \times 10^{- 5} T$

$2 π \times 10^{- 2} T$

$2 π \times 10^{- 3} T$

Magnetic field at the axis inside the solenoid $B = μ_{0} ni$ Here, $n = 10 t u r n s / c m = 1000 t u r n s / m, i = 5 A$ $∴$ $B = 4 π \times 10^{- 7} \times 1000 \times 5$ $= 2 π \times 10^{- 3} T$

Q. A solenoid 1.5 m long and 0.4 cm in diameter possesses 10 turns per cm length. A current of 5 A falls through it. The magnetic field at the axis inside the solenoid is

2π×10−3T

2π×10−5T

2π×10−2T

2π×10−3T

Magnetic field at the axis inside the solenoid B=μ0​ni Here, n=10turns/cm=1000turns/m,i=5A ∴ B=4π×10−7×1000×5 =2π×10−3T

$2 π \times 10^{- 3} T$

$2 π \times 10^{- 5} T$

$2 π \times 10^{- 2} T$

$2 π \times 10^{- 3} T$

Magnetic field at the axis inside the solenoid $B = μ_{0} ni$ Here, $n = 10 t u r n s / c m = 1000 t u r n s / m, i = 5 A$ $∴$ $B = 4 π \times 10^{- 7} \times 1000 \times 5$ $= 2 π \times 10^{- 3} T$