Physics Electrostatics Level: University
Coulomb's LawA raindrop inside a thundercloud has a charge -8e. What is the electric force on the raindrop if the electric field at its location (due to other charges in the cloud has magnitude of 2.0 x 10^6 N/C and is directed up?
Physics Electrostatics Level: University
Gauss's theoremPower lines have a limit on the maximum size of the electric field they produce. In most states a maximum of 5 kN/C at about 20 m from the wires is allowed. This is quite large compared to the Earth's fair-weather electric field of about 100 N/C. Assume that the formula for the electric field of a wire to determine how much charge per unit length is on the wire.
Physics Electrostatics Level: University
Gauss's theoremA solid sphere of charge of radius R has a total charge of q uniformly spread throughout the sphere. (a) Find the magnitude of the electric field for > = R.
(b) Find the magnitude of the electric field for r < = R. (c) Sketch a graph of E (r) for 0<=r<=3R.
Physics Electrostatics Level: University
Gauss's TheoremIn fair weather over flat ground there is a downward electric field of about 150 N/C. (A) Assume that the Earth is a conducting sphere with charge on its surface. If the electric field just outside is 150 N/C radially inward calculate the total charge on the Earth and the charge per unit area. (b) At an altitude of 250 m above the Earths surface the field is only 120 N/C. Calculate the charge density
( Charge per unit volume) of the air ( assumed constant).
Physics Electrostatics Level: University
Electric Field and Motion of Charge in itAn electron moving at a speed of 8.4 X 10^6 m/s passes between a pair of parallel plates that are vertically oriented with the plate on the right being positively charged and the plate on the left being negatively charged. The plates each have an area of 2.50 cm by 2.50 cm and they are separated by a distance of 0.50 cm. The uniform deflected? (b) By how much is the electron deflected after passing through these plates?
Physics Electrostatics Level: University
Loulombs LawA small sphere with a charge of -6.0 X 10^-7 C is placed in a uniform electric field of magnitude 1.2 X 10 ^6 N/C pointing to the west. What is the magnitude and direction of the force on the sphere due to the electric field?
Physics Electrostatics Level: University
Coulombs LawA K^ + and a Cl^- ion are directly across from each other on opposite sides of a membrane 9.0 nm thick. What is the electric force on the K ^ + due to the Cl^-ion? Ignore the presence of other charges.
Physics Electrostatics Level: University
Coulombs LawThree point charges are fixed in place in a right triangle. One charge of -0.60 micro C at location (0 0 ) on an X -Y axis. The second charge of +0.80 Micro C at location ( 0 8 ) on an X - Y axis. The third charge of + 1.0 Micro C at ( 6 0 ) on an X - Y axis. What is the electric force on the - 0.60 Micro C charge due to the other two charges.
Physics Electrostatics Level: University
ChargeSuppose a 1.0-g nugget of pure gold has zero net charge. What would be its net charge after it has 1.0 persent its electrons removed?
Physics Electrostatics Level: University
Charge Suppose a 1.0-g nugget of pure gold has zero net charge. What would be its net charge after it has 1.0 percent of its electrons removed?
Physics Electrostatics Level: University
CapacitorIf a capacitor has 3.77uC of charge on it and an electric field of 1.82 kV/mm is desired if they are separated by 4.21 mm of air what must each plates area be?
Physics Electrostatics Level: University
PotentialsA charge Q craetes an electric potential of + 259 V at a distance of 14.3 cm. What is Q?
Physics Electrostatics Level: University
PotentialA uniform electric field of magnitude 261 V/m is directed in the negative x direction A - 11.0 uC charge moves from the origin to the point ( x y ) = ( 17.3 cm 53.9 cm ). What was the change in the potential energy of this charge?
Physics Electrostatics Level: University
Energy stored in CapacitorA huge 4.94 F capacitor has enough stored energy to heat 2.03 kg of water from 20.7 degree C to 93.6 degree C. What is the potential difference across the plates?
Physics Electrostatics Level: University
PotentialsAn electron starting from rest acquires 4.90 keV of kinetic energy in moving from point A to point B. How much kinetic energy would a proton acquire starting from rest at B and moving to point A?
