1. An electric field of 3x104 N/C exerts a force of 0.186N on a charge. What is
ID: 1326010 • Letter: 1
Question
1. An electric field of 3x104 N/C exerts a force of 0.186N on a charge. What is the value of the charge? (a) 2.07x10^-10 C (b) 1.6 mC (c) 6.2 muC (d) 1.6x10^5 C (e) Zero, this is a aHiggs Bozoa particle 2. A particle (mass 6.7 x 10-27 kg, charge 3.2 x 10-19 C) moves along the positive x axis with a speed of 7.8 x 105 m/s. It enters a region of uniform electric field parallel to its motion and comes to rest after moving 3.0 m into the field. What is the magnitude of the electric field? (a) 6369 N/C (b) 804 N/C (c) 1206 N/C (d) 2123 N/C (e) 3185 N/CExplanation / Answer
1 ) F = E*q
q = F/E = 0.186/3e4
option C = 6.2*10^-6 C
2) KE = F*s
0.5*m*v^2 = E*q*s
0.5*6.7e-27*7.8e5*7.8e5 = E*3.2e-19*3
E = 2123 N/C
option D
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