1) Tripling the separation between charges changes the potential energy of a pair of point charges by a factor of
a) 3 b) 9 c) 1/9 d) 1(no charge)
2) which of the following statements is true?
a) electric field lines stay inside equipotential surfaces
b) equipotential surfaces intersect in straight lines
c) equipotential surfaces intersect in curved lines
d) electric field lines are perpendicular to equipotential surfaces
e) equipotential surfaces are parallel to each other
3) a parallel plate capacitor has an air dielectric. The capacitor is charged with surface charge density adn then the voltage source is removed. When an insulator with dielectric constant 5.0 is inserted between the plates, what happens to the electric field strength if the surface charge density does not change?
a) it increases by a factor of 5
b) it increases by a factor of 25
c) it decreases by a factor of 5
d) it decreases by a factor fo 25
E) it stays the same
4) A thin metallic spherical shell of radius 50cm has total charge fo 4.0mC placed on it. At the center of the shell is placed a point charge of 2.00mC. What is the electric field at a distance of 90cm from the center of the spherical shell?
a) 4.4x10^4 N/C outward
b) 2.7x10^3 N/C inward
c) 6.7x10^4 N/C outward
d) 8.8x10^4 N/C outward
e) 6.7x10^4 N/C inward
it would be greatly appreciated if someone can help me out with my homework in other to understand this concept more...best answer will get 10pts..thank you very much
I REALLY NEED HELP PLEASE ANSWER!! THANKS
a) 3 b) 9 c) 1/9 d) 1(no charge)
2) which of the following statements is true?
a) electric field lines stay inside equipotential surfaces
b) equipotential surfaces intersect in straight lines
c) equipotential surfaces intersect in curved lines
d) electric field lines are perpendicular to equipotential surfaces
e) equipotential surfaces are parallel to each other
3) a parallel plate capacitor has an air dielectric. The capacitor is charged with surface charge density adn then the voltage source is removed. When an insulator with dielectric constant 5.0 is inserted between the plates, what happens to the electric field strength if the surface charge density does not change?
a) it increases by a factor of 5
b) it increases by a factor of 25
c) it decreases by a factor of 5
d) it decreases by a factor fo 25
E) it stays the same
4) A thin metallic spherical shell of radius 50cm has total charge fo 4.0mC placed on it. At the center of the shell is placed a point charge of 2.00mC. What is the electric field at a distance of 90cm from the center of the spherical shell?
a) 4.4x10^4 N/C outward
b) 2.7x10^3 N/C inward
c) 6.7x10^4 N/C outward
d) 8.8x10^4 N/C outward
e) 6.7x10^4 N/C inward
it would be greatly appreciated if someone can help me out with my homework in other to understand this concept more...best answer will get 10pts..thank you very much
I REALLY NEED HELP PLEASE ANSWER!! THANKS