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An electron moving along positive X axis with a velocity of enters a region having uniform magnetic…
An electron moving along positive X axis with a velocity of $8 \times 10^7\text{ ms}^{-1}$ enters a region having uniform magnetic field $B = 1\cdot 3 \times 10^{-3}\text{ T}$ along positive Y axis.
(a)
Explain why the electron describes a circular path.
(b)
Calculate the radius of the circular path described by the electron.
Answer
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From ISC 2025 Specimen Physics Paper 1, question 12(ii).