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Byju's Answer

Standard XII

Physics

Analysis of Force Equation

An electron t...

Question

An electron travelling with a velocity $¯ V = 10^{7} i m / s$ enter a magnetic field of induction $¯ B = ¯ ¯¯¯ ¯ 2 j$ . The force on electron is

1.6 \times 10^{- 12} ¯ j N

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3.2 \times 10^{- 12} ¯ k N

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6.4 \times 10^{- 12} ¯ k N

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- 3.2 \times 10^{- 12} ¯ k N

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Solution

The correct option is B $3.2 \times 10^{- 12} ¯ k N$
$¯ F = q (\to V \times \to B)$
= $q \times 10^{7} \times 2 \times ¯ k$
= $1.6 \times 10^{- 19} \times 2 \times 10^{7} ¯ k N$
= $3.2 \times 10^{- 12} ¯ k N$

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An electron travelling with a velocity ¯V=107i m/s enter a magnetic field of induction ¯B=¯¯¯¯¯2j . The force on electron is

The correct option is B 3.2×10−12¯kN¯F=q(→V×→B)=q×107×2×¯k=1.6×10−19×2×107¯kN=3.2×10−12¯kN

An electron travelling with a velocity $¯ V = 10^{7} i m / s$ enter a magnetic field of induction $¯ B = ¯ ¯¯¯ ¯ 2 j$ . The force on electron is

The correct option is B $3.2 \times 10^{- 12} ¯ k N$
$¯ F = q (\to V \times \to B)$
= $q \times 10^{7} \times 2 \times ¯ k$
= $1.6 \times 10^{- 19} \times 2 \times 10^{7} ¯ k N$
= $3.2 \times 10^{- 12} ¯ k N$