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Electromagnetism — Question 165

Original QCE Vault practice · 6 marks

Q165 · Practice questionComplex unfamiliar6 marks

QUESTION 165 (6 marks)

Two fixed point charges are positioned relative to O: +2.00 μC+2.00\,\mu\mathrm C is 0.300 m0.300\,\mathrm m to the left and −3.00 μC-3.00\,\mu\mathrm C is 0.400 m0.400\,\mathrm m above. Use k=9.00×109 N m2 C−2k=9.00\times10^9\,\mathrm{N\,m^2\,C^{-2}}.
O is at the lower right of an L-shaped construction. A positive 2.00 microcoulomb charge is 0.300 m left of O; a negative 3.00 microcoulomb charge is 0.400 m above O. Charge values are positioned directly above their respective charge symbols. Not to scale.
a)
Determine the magnitude and direction of the resultant electric field at O.
[4 marks]
b)
Determine the force on an electron placed at O. Use charge magnitude 1.60×10−19 C1.60\times10^{-19}\,\mathrm C.
[2 marks]
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