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Question

Physics Question on Inductance

A solenoid of 1.5 m length and 4.0 cm diameter possesses 10 turns/cm. A current of 5 A is flowing through it. The magnetic induction at axis inside the solenoid is

A

2π×10−3T2 \pi \times 10^{-3}T

B

2π×10−5T2 \pi \times 10^{-5}T

C

2π×10−3G2 \pi \times 10^{-3}G

D

2π×10−5G2 \pi \times 10^{-5}G

Answer

2π×10−3T2 \pi \times 10^{-3}T

Explanation

Solution

Magnetic field B =μ0ni= \mu _0ni
h space.15mm=4π×10−7×5×1000h\,space\\.15mm =4 \pi \times 10^{-7} \times 5 \times 1000
h space  15mm=2π×10−3Th\,space\,\,15mm = 2 \pi \times 10^{-3} T