Solved >   31. Two point charges are separated by:2101792 …

31. Two point charges are separated by 10.0 cm and have charges of +2.00 µC and -2.00 µC, respectively. What is the electric field at a point midway between the two charges? (ke = 8.99 ´ 109 N·m2/C2)

A. 28.8 ´ 106 N/C

B. 14.4 ´ 106 N/C

C. 7.19 ´ 106 N/C

D. zero

32. Electric field is dimensionally equivalent to which of the following?

A. N?m/C

B. N/C

C. N?m2/C2

D. N/C2

33. An electron with a charge value of 1.6 ´ 10-19 C is moving in the presence of an electric field of 400 N/C. What force does the electron experience?

A. 2.3 ´ 10-22 N

B. 1.9 ´ 10-21 N

C. 6.4 ´ 10-17 N

D. 4.9 ´ 10-17 N

34. Charges of 4.0 µC and -6.0 µC are placed at two corners of an equilateral triangle with sides of 0.10 m. At the third corner, what is the electric field magnitude created by these two charges? (ke = 8.99 ´ 109 N·m2/C2)

A. 4.5 ´ 106 N/C

B. 3.1 ´ 106 N/C

C. 1.6 ´ 106 N/C

D. 4.8 ´ 106 N/C

35. The average distance of the electron from the proton in the hydrogen atom is 0.51 ´ 10-10 m. What is the electric field from the proton’s charge at the location of the electron? (ke = 8.99 ´ 109 N?m2/C2, e = 1.6 ´ 10-19 C)

A. 5.5 ´ 1011 N/C

B. 1.0 ´ 106 N/C

C. 3.2 ´ 102 N/C

D. 8.8 ´ 10-8 N/C

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