TS EAMCET · Physics · Magnetic Effects of Current
A solenoid has a core of a material with relative permeability \(\frac{800}{\pi}\). The windings of the solenoid are insulated from the core and carry current of \(2 \mathrm{~A}\). If the number of turns is 1000 per metre, find the magnetic field \(B\).
- A \(640 \mathrm{mT}\)
- B \(330 \mathrm{mT}\)
- C \(480 \mathrm{mT}\)
- D \(560 \mathrm{mT}\)
Answer & Solution
Correct Answer
(A) \(640 \mathrm{mT}\)
Step-by-step Solution
Detailed explanation
Given, relative permeability, \(\mu_r=\frac{800}{\pi}\) Current, \(I=2 \mathrm{~A} \Rightarrow n=1000 \mathrm{~m}^{-1}\) As we know that, \(H=n I=1000 \times 2=2 \times 10^3 \mathrm{Am}^{-1}\) Since, \(\quad B=\mu H=\mu_0 \mu_r H \quad\left(\because \mu=\mu_0 \mu_r\right)\)…
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