practiceexam1solns

Practiceexam1solns - EXAM 1 Dr Edward Rhoads IUPUI Physics 219 Summer 2008 Note some tests were slightly different than this one and therefore had

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EXAM 1 IUPUI Physics 219 Dr. Edward Rhoads Summer 2008 Note: some tests were slightly different than this one and therefore had slightly different answers. Part I – Multiple Choice Conceptual Questions 1) Two charged objects attract each other with an electric force F . Suppose that the distance between them is doubled. The new electric force equals (A) 2 F (B) ½ F (C) 4 F (D) 1/8 F (E) 1/4 F Force is proportional to 1/r 2 2) A higher Capacitance tells you that: (A) you collecting charge more efficiently (B) you can collect less charge (C) you are collecting charge less efficiently (D) you are using a dielectric with a lower dielectric constant (E) none of the above 3) Electric field lines ALWAYS (A) point toward decreasing values of potential. (B) point in the same direction as the electric force. (this one is violated by negative charges) (C) are parallel to equipotential surfaces. (D) start on negative charges and end on positive charges. (this one is untrue if there is not a positive or a negative charge) (E) point directly to a charge. 4) A proton, released at rest in an electric field (with an assortment of charges), ALWAYS moves: (A) along an equipotential surface. (C) in a straight line directly to the nearest electron – What happens if there is either no electron or a large charge that is only slightly further away… (B) nowhere. (D) down an electric field line (high to low potential). (E) up an electric field line (low to high potential). This on is for negative charges. 5) Electric Potential is in units of: (A) Volts (B) Joules (Energy) (C) Newton / Coulomb (Electric Field) (D) Coulombs (Charge) (E) Watts (Power) 6) A resistance is a measure of a devices: (A) ability to store charge (B) ability to limit flow of charge (C) ability to resist heating (D) ability to produce force (E) ability to resist corrosion 7) In general when two resistors of unequal resistance are connected in series, (A) the heat generated by each resistor is the same. (B) the current through each resistor is the same.
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This note was uploaded on 12/01/2010 for the course PHYSICS 21900 taught by Professor Rhoads during the Spring '10 term at IUPUI.

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Practiceexam1solns - EXAM 1 Dr Edward Rhoads IUPUI Physics 219 Summer 2008 Note some tests were slightly different than this one and therefore had

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