COMEDK · Physics · 21. Magnetic Effects of Current
An electric field of \(1500 \mathrm{~V} / \mathrm{m}\) and a magnetic field of \(0.40 \mathrm{~Wb} / \mathrm{m}^{2}\) act on a moving electron. The minimum uniform speed along a straight line the electron could have is
- A \(1.6 \times 10^{15} \mathrm{~m} / \mathrm{s}\)
- B \(6 \times 10^{-16} \mathrm{~m} / \mathrm{s}\)
- C \(3.75 \times 10^{3} \mathrm{~m} / \mathrm{s}\)
- D \(3.75 \times 10^{2} \mathrm{~m} / \mathrm{s}\)
Answer & Solution
Correct Answer
(C) \(3.75 \times 10^{3} \mathrm{~m} / \mathrm{s}\)
Step-by-step Solution
Detailed explanation
Given, electric field, \(E=1500 \mathrm{~V} / \mathrm{m}\) Magnetic field, \(B=0.4 \mathrm{~Wb} / \mathrm{m}^{2}\) Charge on electron, \(q=e=1.6 \times 10^{-19} \mathrm{C}\) For minimum uniform speed of electron along a straight line is a region, where electric field \(E\) and…
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