Question

A solenoid has a core of a substance with relative permeability 600. What is the magnetic permeability of the given substance?

• A. 20 $\pi \times$ 10-5NA-2
• B. 21 $\pi \times$ 10-5 N A-2
• C. 22 $\pi \times$ 10-5 N A-2
• D. 24$\pi \times$ 10-5 N A-2

Answer 1

Answer: (D)

24$\pi \times$ 10-5 N A-2

Answer 2

: As , $\mu = \mu _ { \mathrm { r } } \mu _ { 0 }$

Here, , $\mu _ { r } = 600$ and $\mu _ { 0 } = 4 \pi \times 10 ^ { - 7 } \mathrm { NA } ^ { - 2 }$

$\therefore$ Magnetic permeability.,

$\mu = 600 \times 4 \pi \times 10 ^ { - 7 } = 24 \pi \times 10 ^ { - 5 } \mathrm { NA } ^ { - 2 }$