Please explain the reasoning behind each choice, thanks in advance: Multiple-Cho
ID: 1572227 • Letter: P
Question
Please explain the reasoning behind each choice, thanks in advance:
Multiple-Choice Problems Wednesday Homework Problem 2.1 The nucleus of an atom is composed of protons and neutrons. Protons have a positive charge and neutrons are neutral. The nucleus is held together by the strong force which is far stronger than the electric force at very short distances. If the strong force did not exist, could the electric force hold the nucleus together? Select One of the Following: (a) yes (b) no Wednesday Homework Problem 2.2 An electrophorus is a flat metal plate with an insulating handle. The electrophorus is charged by grounding the plate while it sits on a charged dielectric. If an electrophorus is charged by grounding on a positively charged dielectric, what net charge does the electrophorus acquire? Select One of the Following: (a) positive (b) negative Wednesday Homework Problem 2.3 One insulating sphere initially has charge Q1> 0 and another insulating sphere has Qt 0. The spheres are then connected with a conducting wire. What is the approximate sign of the charge on each sphere? Assume that there are no losses to the environment. Select One of the Following: (a) 0, Q (b) Q1> 0, Q (c) 21 0, Q2 0 (d) Q1> 0, 22 0 (e) Q1 0,Q2 0Explanation / Answer
2.1 - No , beacuse neutrons are neutral and does not feel any electrostatic force
2.2 - negative, beacuse positive charge is grounded
2.3 - option d , because net charge distributed equally on both the spheres
2.4 - b, beacuse sphere 1 is positive , positive reples positive then sphere 2 is also positive, sphere 3 is negative ( positive attracts negative) and sphere 4 is neutral ( does not feel any force )
2.5 - a , because when induced then opposite charge attracts each other
2.6 - b, force on the can directed towards the tube, attractive force
2.7 - b
2.8 - charge can neither be created nor b destroyed , conservation of charge
2.9 - negative , because rod is positive, sphere gains negative charge and positive charge of sphere grounded
2.10 - d