QUESTIONS (2 points each) Read each question carefully! These should take no mor

Question

QUESTIONS (2 points each) Read each question carefully! These should take no more than 30-45 seconds each. Don't waste tinse on a qpiestion you can't answer itt Guess and move on! 1) A line of uniformly distributed negative charge is bent such that it forms an are with a length of 1/3 of the circumference of a circle. The charge's net electric field at the center of curvature will be: A) directed towards the center of the are segment B) directed away from the center of the arc segment zero D) directed perpendicular to the arc segment's line of symmetry E) none of the above 2) A rectangular prism with a height of 6m has a top surface with edges of 3m and 4m. Which of the following describes the magnitude and direction of an area vector A for the top surface? A) B) 5m2 and directed 45° from the top surface 1 8m2 and perpendicular to the top surface 12m2 and parallel to the top surface D Cannot be determined from the information given E) none of the above 3) A dipole is immersed in a uniform electric field. The torque on the dipole due to the electric field will be a maximum if: A) B) C) D) E) the dipole moment is directed parallel to the electric field the dipole moment is directed antiparallel to the electric field the dipole moment is directed perpendicular to the electric field the distance between the charges of the dipole is reduced to zero none of the above Two very large nonconducting sheets of charge of identical uniform surface charge densities, o, are parallel and separated by a small distance. Compare the electric field between the sheets to the electric field outside of the sheets. 4) the field between is zero while the field outside is equal to 2Eo B) the field between is zero while the field outside is equal to C) the field between is a/2t, while the field outside is equal to zero D) the field between is al, while the field outside is equal to zero E) impossible to determine

Explanation / Answer

3 ). As it is a cross product of dipole moment vector and electric field vector, torque will be maximum if dipole moment is perpendicular to electric field.

4) If the sheets are having opposite charge then electric field outside will be zero and sigma/Eo between the sheets.

True/False

2) The proton will move in the direction of electric field.

3) if we are talking about inside the shell, then it is always zero.

4). The energy stored is proportional to square of voltage so it is not independent of voltage.

6)False. In case of capacitors in parallel, the capacitance of all the capacitors will simply add up. So total capacitance will be much larger.

8) Main purpose of vectors in to define direction and magnitude in space irrespective to the area in which they are being used.

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