An electron (charge ) enters a region with velocity in a uniform magnetic field

PHYSICS · Single correct · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism

Problem

An electron (charge −1.6×10−19 C-1.6\times10^{-19}\,\text{C}) enters a region with velocity v⃗=2.0×106 i^ m s−1\vec v = 2.0\times10^{6}\,\hat i\,\text{m s}^{-1} in a uniform magnetic field B⃗=0.30 k^ T\vec B = 0.30\,\hat k\,\text{T}. What is the magnetic force acting on the electron? (a) −9.6×10−14 j^ N-9.6\times10^{-14}\,\hat j\,\text{N} (b) +9.6×10−14 k^ N+9.6\times10^{-14}\,\hat k\,\text{N} (c) +9.6×10−14 j^ N+9.6\times10^{-14}\,\hat j\,\text{N} (d) +3.2×10−13 j^ N+3.2\times10^{-13}\,\hat j\,\text{N}

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