JEE Mains · Physics · STD 12 - 4. Moving charges and magnetism
A current loop, having two circular arcs joined by two radial lines is shown in the figure. It carries a current of \(10\, A\). The magnetic field at point \(O\) will be close to
- A \(1.0 \times {10^{ - 7}}\,T\)
- B \(1.5 \times {10^{ - 7}}\,T\)
- C \(1.5 \times {10^{ - 5}}\,T\)
- D \(1.0 \times {10^{ - 5}}\,T\)
Answer & Solution
Correct Answer
(D) \(1.0 \times {10^{ - 5}}\,T\)
Step-by-step Solution
Detailed explanation
Magnetic field at clentre of an area subtending angle \(\theta\) at the centre \(\frac{\mu_{0} I}{4 \pi r} \theta\) \(B=\left(\frac{\mu_{0}}{4 \pi}\right) \times 10\left(\frac{1}{3 \times 10^{-2}}-\frac{1}{5 \times 10^{-2}}\right) \frac{\pi}{4}\)…
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