Question 13.5 ptsOne of the major differences between gravitational and electric forces isthat electrical forces ______.Group of answer choicesare weakerobey the inverse-square lawact over short distancesonly attractrepel or attract Flag question: Question 2Question 23.5 ptsPigeons navigate mainly by _______.Group of answer choicesmagnetic sensors in their headsa keen sense of smellultra-high-pitched soundsa good memorynone of the above Flag question: Question 3Question 33.5 ptsA circuit breaker is ______.Group of answer choicescapacitorbatteryfuseall of the abovenone of the above Flag question: Question 4Question 43.5 ptsThe current produced by voltage in a circuit is impeded by _______.Group of answer choicesclosed switcheselectric barrierselectric resistancenone of the above Flag question: Question 5Question 53.5 ptsSteve touches a 100,000-volt Van de Graaff generator. Even though thevoltage is high, the relatively small amount of charge means a relatively smallamount of _____.Group of answer choicespolarizationconductionelectric fieldenergy transfer Flag question: Question 6Question 63.5 ptsThe amount of current in a CFL rated 24W 120V is ______.Group of answer choices5 Amore than 6 Aless than 4 A Flag question: Question 7Question 73.5 ptsElectrons flow in an electrical circuit by ______.Group of answer choicescolliding with moleculesinteracting with an established electric fieldbeing bumped by other electronsnone of the above Flag question: Question 8Question 83.5 ptsOver geologic history the Earth's magnetic field ______.Group of answer choiceshas increased in strength exponentiallyhas been relatively stablehas reversed direction many timesis unknown Flag question: Question 9Question 93.5 ptsAn electrostatic force F attracts two charges. If the magnitude of thecharge of both particles is doubles and the distance between them is alsodoubled. The force will be ________.Group of answer choicesF/22 FF/4Fnone of the above Flag question: Question10Question 103.5 ptsAn electron and a proton ______.Group of answer choicesrepel each otherneither attract nor repel each otherattract each other Flag question: Question11Question 113.5 ptsThe current in two identical light bulbs connected in series is 1 A. Thevoltage across both bulbs is 120 V. The resistance of a single light bulb is______.Group of answer choices220 ohms60 ohms120 ohms40 ohmsnone of the above Flag question: Question12Question 123.5 ptsWe know that electric charges can be isolated but magnetic poles ______.Group of answer choicesgather in clusterscan alsocannotnone of the above Flag question: Question13Question 133.5 ptsThe equivalent resistance of 2-ohm, 2-ohm, and 1-ohm in parallel is about_____.Group of answer choices2 ohms0.5 ohm0.2 ohms20 ohms0.05 ohm Flag question: Question14Question 143.5 ptsThe kilowatt-hour is a unit of _______.Group of answer choicesvoltagepowercurrentenergyresistance Flag question: Question15Question 153.5 ptsEarth's magnetic field is _________.Group of answer choicesprotective to life on Earthsomething we've learned to live withuseful to pigeons but not to humans Flag question: Question16Question 163.5 ptsTwo charges separated by 1 m exert 1-N forces on each other. If themagnitude of each charge is tripled, the force on each charge is _______.Group of answer choices3 N6 N9 N12 Nnone of the above Flag question: Question17Question 173.5 ptsSometimes the current in lamps is too feeble to produce glowing of the lampfilaments, which occurs when _____.Group of answer choicestoo many lamps are connected in seriestoo much current is drawn by the batterytoo many lamps are connected in parallel Flag question: Question18Question 183.5 ptsA semiconductor can be ______.Group of answer choicesa conductoran insulatorboth of theseneither of these Flag question: Question19Question 193.5 ptsWhat does the electric field inside a Van de Graaff generator depend on?Group of answer choicesamount of charge and volume of the domevolume of the domeamount of external chargenone of the above Flag question: Question20Question 203.5 ptsAn uncharged pith ball is suspended by a fish line. When apositively-charged rod is brought nearby, the pith ball _______.Group of answer choicesis unaffectedmoves toward the rodmoves away from the rodnone of the above Flag question: SpacerPlease show your full solution steps. First state what is given, then startwith the symbolic equation, then show data entered into the equation, and thenthe final answer with proper units. Please write your steps vertically. Youwill not gain credit for showing only the answer. Flag question: Question21Question 2110 ptsCalculate the Electrostatic force between a proton and an electron if therewere separated by a distance of 0.001 m. The charge of the electron and theproton is the same except that the electron is negatively charged and theproton is positively charged. The magnitude of the charge is 1.6 E -19 C. Giventhat the proportionality constant is k = 9 E 9 M.m2/C2. Flag question: Question22Question 2210 ptsCalculate the consumption rate (in Watts) of a toaster that is connected toa 120-V outlet and draws a current of 2 A. Flag question: Question23Question 2310 ptsHow much does it cost (in cents) to operate 1500-Watt heater for 2 hours?Assume the power company charges 10 cents per kWh.
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