Physics 212 Exam I Sample Question Bank 2008 Multiple Choice ...

Physics 212 Exam I Sample Question Bank 2008___ . Two unequally charged pellets are held apart at a fixed distance. The charge on one of the pellets ishalved, and the charge on the other is doubled. The electric force one pellet exerts on the other(A) will double.(B) will be halved.(C) will not change.(D) will increase by a factor of 4.(E) will decrease by a factor of 1/4.___ . Two unequally charged pellets are held apart at a particular distance. The charge on both of the pellets isdoubled, and the distance between the charges is also doubled. The electric force one pellet exerts on theother(A) will double.(B) will be halved.(C) will not change.(D) will increase by a factor of 4.(E) will decrease by a factor of 1/4.___ . Two identical charges repel each other with a force of 4N. If the distance between the charges is halved,the force will be(A) 1N.(B) 2N.(C) 8N.(D) 16N.(E) none of the above.___ . A positive charge of 4.0 µC exerts an attractive force of 8N on an unknown charge 20 cm away. Theunknown charge is(A) + 8.9 µC .(B) - 8.9 µC .(C) + 44. µC .(D) - 44. µC .(E) none of the above.___ . What must be the charge of a particle of mass 1kg for it to be levitated in a 1000 N/C downward directedelectric field?(A) + 9.8 µC.(B) - 9.8 µC.(C) + 9.8 nC.(D) - 9.8 nC.(E) none of the above.___ . In a static situation, if there is excess charge on a conductor then(A) the charge lies only on the surface of the conductor.(B) the charge is in constant motion throughout the conductor.(C) the charge evaporates from the conductor until there is no more excess charge.(D) the charge lies at the geometric center of the conductor.(E) the conductor explodes violently.