AP EAMCET · PHYSICS · Magnetic Effects of Current
A long current carrying wire produces a magnetic field of 1 \(\mathrm{T}\) at a distance of \(r\). The magnetic field (a) \(\frac{\mathrm{r}}{2}\) (b) \(2 \mathrm{r}\) and (c) \(3 \mathrm{r}\) is
- A (a) \(2 \mathrm{~T},(\mathrm{~b})=\frac{1}{2} \mathrm{~T},(\mathrm{c})=\frac{1}{3} \mathrm{~T}\)
- B (a) \(3 \mathrm{~T},(\mathrm{~b})=\frac{1}{3} \mathrm{~T},(\mathrm{c})=\frac{1}{6} \mathrm{~T}\)
- C (a) \(\frac{3}{2} \mathrm{~T},(\mathrm{~b})=\frac{1}{4} \mathrm{~T},(\mathrm{c})=\frac{1}{8} \mathrm{~T}\)
- D (a) \(\frac{5}{2} \mathrm{~T},\left(\right.\) b) \(=\frac{1}{2} \mathrm{~T},(\mathrm{c})=\frac{1}{3} \mathrm{~T}\)
Answer & Solution
Correct Answer
(A) (a) \(2 \mathrm{~T},(\mathrm{~b})=\frac{1}{2} \mathrm{~T},(\mathrm{c})=\frac{1}{3} \mathrm{~T}\)
Step-by-step Solution
Detailed explanation
For a long straight wire \[ B=\frac{\mu_0 \mathrm{i}}{2 \pi \mathrm{r}} \]…
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