AP EAMCET · PHYSICS · Magnetic Effects of Current
A solenoid has a core of a material with relative permeability 400 . The windings of the solenoid are insulated from the core and carry a current of \(4 \mathrm{~A}\). If the number of turns is 500 per metre, then the magnetizing field is
- A \(2 \pi \times 10^3 \mathrm{Am}^{-1}\)
- B \(1 \times 10^3 \mathrm{Am}^{-1}\)
- C \(4 \times 10^3 \mathrm{Am}^{-1}\)
- D None of the above
Answer & Solution
Correct Answer
(D) None of the above
Step-by-step Solution
Detailed explanation
\begin{aligned} & \text { Given, } \mathrm{I}=4 \mathrm{~A}, \mathrm{n}=500 \mathrm{~m}^{-1}, \mu_{\mathrm{r}}=400 \\ & \text { Magnetic intensity, } \mathrm{H}=\mathrm{nI}=500 \times 4 \\ & =2000 \mathrm{Am}^{-1} \\ & \mu_{\mathrm{r}}=1+\chi \text { and }…
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