MCAT Prsies Proctice Practice hestlons 31. All of the following affect the elect
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MCAT Prsies Proctice Practice hestlons 31. All of the following affect the electrostatic field strength at a point at a distance froma source charge, EXCEPT A. the sign of the source charge B. the distance fron the source charge C. the magnitude of the source charge D. the nature of the medium surrounding the source charge 32. A charged particle is observed traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path would be: A. three times the original radius C. one-half of the original radius B. twice the original radius D. four times the original radius 33. Two charges separated by 1 m exert a 1 N force on each other. If the magnitude of each charge is doubled, the force on each charge is: A. IN B. 2N C. 4 N D. 6N 34. In a water solution of NaCl, the NaCI dissociates into ions surrounded by water molecules. Consider a water molecule near a Na" ion. What tends to be the orientation of the water molecule? A. The hydrogen atoms are nearer the Na' ion because of their positive charge B. The hydrogen atoms are nearer the Na' ion because of their negative charge C. The oxygen atom is nearer the Na ion because of the oxygen's positive charge D. The oxygen atom is nearer the Na ion because of the oxygen's negative charge 35. A metal sphere is insulated electrically and is given a charge. If 30 electrons are added to the sphere in giving a charge, how many Coulombs are added to the sphere? (Use Coulomb's constant k = 9 × 10"N-m3C2 and charge of an electron e--1.6 10-19 C) A. -24 C B. 30C C -4.8 x10 C D. 4.8 x 10-16 C What happens to the cyclotron frequency of a charged particle if its speed doubles? A. It remains the same B. It is ½ as large 36. C. It doubles D. It is2 times as large 37. A positive test charge g is released near a positive fixed charge Q. As g moves away from Q, it experiences: A. increasing acceleration B. decreasing acceleration C. constant velocity D. decreasing velocity 132 Copyright O 2018 Sterling Test Prep. Any duplication is illegal.Explanation / Answer
Q31. Option A
Sign of charge determines the direction of the Electric field but not Strength.
Q32. Option B because radius = mV/qB , doubling the speed will double the radius.
Q33. Option C, according to Coulomb's law, electrostatic force depends on the product of charges. So by doubling them, electrostatic force will become 4 times.
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