Physics Electrostatics Level: High School
In a region where there is an electric field , the electric force do +8.0 x 10^-19 J of work on an electron as it moves from point X to point Y. Which point , X or Y is at a higher potential ? What is the potential difference , Vy – Vx, between point Y and point X ?
Physics Electrostatics Level: High School
Charges of +2.0 nC and -1.0 nC are located at the opposite corners of a square with side lengths of 1.0 cm . What is the electric potential at a third corner of the square (X) where there is no charge ?
Physics Electrostatics Level: High School
Two point charges ,are located 8cm apart on the X-axis . The charge at the origin is +10.0nC and the charge at the 8cm mark is -10.0 nC . What is the total electric potential energy of the three charges when a third point charge of -4.2 nC is placed 4.0 cm to the left of the origin , at 4cm on the X-axis (between the two existing charges) , and at a point above both points so that the three points together form an equilateral triangle with side lengths of 8.0 cm . (Let U =0 when all three charges are separated by an infinite distance . )
Physics Electrostatics Level: High School
A 4microC charge is separated by a dist . of 20 cm . from a 3 microC charge . A third charge of 2 microC is placed at 20 cm . from the other 2 charges . They form a Equilateral Triangle . Find the magnitude and direction of the electric field at the 2 microC charge .
Physics Electrostatics Level: High School
Two 3 gram balloons are suspended from a nail by strings 50 cm . long . Each balloon has a +q , and there is an angle of 40 degrees between the strings . Find charge q on each balloon ?
Physics Electrostatics Level: High School
A rod with a circlar cross section in made of aluminium and has a length of 15 km and a cross – sectional radius of 12 mm. the ends of the rod are connected to the terminals of a 20 V battery . Determine(a) the resistance of the rod
(b) the current flowing across the rod
Physics Electrostatics Level: High School
A parallel plate capacitor consist of 2 rectangular plates of dimensions 12cm by 20 cm , with a separation of 2mm b3etween the plates. If the plates are connected to the terminals of a 15 V battery determine the surface charge density of each plate .
Physics Electrostatics Level: High School
Determine the work required to assemble four identical 15*10^-6 charges at the corners of a rectangle of dimensions 20 cm by 30 cm .
Physics Electrostatics Level: High School
A charge of 5.0 pC is distributed uniformly throughout the colume between concentric spherical surfaces having radii of 1.0 cm and 3.0 cm . A point charge of -2.0 pC is placed at the center of the spherical distribution . Determine the electric field at distances of 0.5cm . 10cm , from the center of the spherical distribution .
Physics Electrostatics Level: High School
Identical point charges Q are placed at two certices of an equilateral triangle of 30 cm sides . A third charge , -2Q is placed at the third vertex . If Q= 20*10^-6 find the magnitude of the total electrostatic force exerted on either of the positive point charges .
Physics Electrostatics Level: High School
A cubic box of side a , oriented as shown at “click here” , contains an unknown charge . The vertically directed electric field has a uniform magnitude E at the top surface and 2E at the bottom surface . How much charge Q is inside the box ?1.Q encl = eo Ea^2
2.Q encl = 2 eo Ea^2
3.Insufficient information
4.Q encl = 0
5.Q encl =1/2 eo E a^2
6.Q encl =3 eo E a^2
Physics Electrostatics Level: High School
An electric field of magnitude 20000 N/C and directed upward perpendicular to the Earth’s surface exists on a day when a thunderstorm is brewing . A truck that can be approximated as a rectangle 6.3 m by 2.5 m is traveling along a road that is inclined 8 degree relative to the ground.Determine the electric flux through the bottom of the truck, Answer in units of N.m^2/C.
Physics Electrostatics Level: High School
An electron , starting from rest , is accelerated by a uniform electric field of 80000 N/C that extends over a distance of 9cm . The charge and the mass of an electron are 1.6 x 10^-19 C and 9.11 x 10^-31 kg respectively. Find the speed of the electron after it leaves the region of uniform electric field Answer in units of m/s .
Physics Electrostatics Level: High School
Given symmetrically placed rectangular insulators with uniformly charged distribution of equal magnitude as shown in the figure at “click here” At the origin , the net field Enet is1. aligned with the negative y- axis
2. along the 315 degree direction
3. along the 60 degree direction.
4. along the 225 degree direction.
5. aligned with the positive x-axis.
6. along the 30 degree direction .
7. aligned with the positive y-axis.
8. along the 135 degree direction .
9. along the 45 degree direction.
10. aligned with the negative x-axis.
Physics Electrostatics Level: High School
The diagram at “click here” depict three electric field patterns . some of these patterns are physically impossible. Assume these electric field patterns are due to static electric charges outside the regions shown . Which electrostatic field patterns are physically possible ?1.(b) only
2.(a) and (b)
3.(c) only
4.(a) and (c)
5.(a) only
6.(b) and (c)
