Please help with these 4 questions. nc hi a posite test charge, but not on a neg
ID: 1784516 • Letter: P
Question
Please help with these 4 questions.
nc hi a posite test charge, but not on a negative one (B) will exert a force on a negative test charge, but not on a positive one (C) can exert a force only on a particle that is physically touching the source of the field (D) has both magnitude and direction. 18 To touch two positively charged rods together, you must (A) do work on the rods to reduce their potential energy (B) do work on the rods to increase their potential energy (C) do work on the rods to keep their potential energy constant (D) none of these; it requires no work to touch two positively charged rods together. 19. Amanda charges a balloon to 3000 volts by rubbing it on her hair. Which of the following statements are true? (Choose as many as apply.) After being charged the balloon has a (A) very high charge (B) small charge (C) large amount of potential energy (D) large amount of potential energy per charge (E) small amount of potential energy per charge. A Van de Graaff generator is used to generate high (A) currents (B) resistances (C) voltages (D) amounts of electrical energy 20 Which of the following statements about the flow of charge are true? (Choose as many as apply.) (A) When the ends of a conductor are at different resistances, charge flows. (B) When the ends of a conductor are at different potentials charge flows. (C) Charge flows until there is no resistance across the conductor (D) Charge flows until there is no potential difference across the conductor (E) Charge flows until all charge gathers at one end of the conductor, and then it begins to flow back in the other direction. 21 (more 118Explanation / Answer
18) B. you always need to do work to increase energy of a system. (conservation of energy)
19) HIGH OR LOW IS A RELATIVE TERM. BOOK NEED TO MENTION REFERENCE FOR ANSWERING THIS PART.
20) C (it is used to generate very high voltage order of 10^5 volts)
21)B,D