Multiple-Choice Homework Problem 4.1 Suppose the electric field was not perpendi
ID: 1406918 • Letter: M
Question
Multiple-Choice Homework Problem 4.1 Suppose the electric field was not perpendicular to the surface of a conductor, what would happen? Select One of the Following: (a) Nothing would happen if the field was not perpendicular to the conductor?s surface. (b) The electric field would be larger inside the conductor than outside the conductor. (c) An electric current would flow along the surface of the conductor. (d) The surface atoms of the conductor would become insulating. (e) The resistance of the conductor would increase. Multiple-Choice Homework Problem 4.2 Given the field map to the right, the dashed box contains all the charge generating the field. Is the long range field that of a monopole or a dipole? Select One of the Following: (a) monopole (b) dipole (c) both a monopole and a dipole. Multiple-Choice Homework Problem 4.3 Using an electrophorus and an electroscope, the following sequence of actions is performed. (1) The dielectric plate of the electrophorus is given a negative charge. (2) The electrophorus is placed on the dielectric plate. (3) The electrophorus is grounded and then the ground is disconnected. (4) The electrophorus is picked up by the insulating handle. (5) The conducting plate of the electrophorus is touched to the bolt of the electroscope, causing the leaves to deflect. After the process, does the electroscope have a net charge? If so, which is the sign of the net charge of the electroscope? Select One of the Following: (a) The electroscope is positively charged. (b) The electroscope is negatively charged. (c) The electroscope has zero net charge. (d) The electroscope may be positively charged or neutral, but not negatively charged. (e) The electroscope may be negatively charged or neutral, but not positively charged.Explanation / Answer
4.1]
If the electric field were not perpendicular to the surface of the conductor, then there would be some component of the E-field parallel to the surface. The excess charges would move along the surface until the arrange themselves so the their parallel E-fields cancel out and the come to rest.
Answer is option C- An Electric current would flow along the surface of the conductor.
4.2]
Answer is option B-dipole.
Since magnetic monopole doesn't exist.
4.3]
Electrons are able to accelerate more freely then protons within a conductor. Therefore when a leaf electroscope is negatively induced the charged will move outwards while in a positively charged electroscope the leafs will stay hanging.
Anser is option d
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