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COMEDK2024PhysicsMagnetic Effects of CurrentActual

A charge of +1 C is moving with velocity V =(2 i +2 j - k ) ms ⁻¹ through a region in which electric field E =( i + j -3 k ) NC ⁻¹ and magnetic field B =( i -2 j +3 k ) T are present. The force experienced by the charge is

Options

  1. A(5 i+6 j-7 k) N
  2. B(-5 i-6 j-7 k) N
  3. C(-5 i+6 j+9 k) N
  4. D(5 i-6 j-9 k) N

Correct answer

D. (5 i-6 j-9 k) N

Step-by-step solution

F = q( E + v B ) , where q = +1 C, v = 2 i +2 j - k , E = i + j -3 k , B = i -2 j +3 k v B = vmatrix i & j & k 2 & 2 & -1 1 & -2 & 3 vmatrix = i (6-2) - j (6+1) + k (-4-2) = 4 i - 7 j - 6 k F = ( i + j -3 k ) + (4 i -7 j -6 k ) F = 5 i - 6 j - 9 k N

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