3761

Physics Electrostatics Level: University

Loulombs Law
A 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?



3760

Physics Electrostatics Level: University

Coulombs Law
A 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.



3759

Physics Electrostatics Level: University

Coulombs Law
Three 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.



3758

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 persent  its electrons removed?



3757

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?



3756

Physics Electrostatics Level: University

Capacitor
If 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?



3755

Physics Electrostatics Level: University

Potentials
A charge Q craetes an electric potential of + 259 V at a  distance of 14.3 cm. What is Q?



3754

Physics Work,Power & Energy Level: University

Conservation of energy
What is the speed of a 3.31 keV electron?



3753

Physics Kinematics Level: University

Capacitor
An electric field of 710 V/m is desired between two parallel plates 17.7mm apart. How large a voltage should be applied?



3752

Physics Electrostatics Level: University

Potential
A 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?



3751

Physics Electrostatics Level: University

Energy stored in Capacitor
A 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?



3750

Physics Work,Power & Energy Level: University


Determine the ratio of the speed of the electron to the speed of the proton at the end of their respective trajectories.



3749

Physics Electrostatics Level: University

Potentials
An 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?



3748

Physics Misc Topic Level: University

Potentials
An electron starting from rest acquires 4.90 ke V 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?















3747

Physics Electrostatics Level: University

Energy of Capacitor
A lightning flash transfers 4.08 C of charge and 3.03 MJ of energy to the Earth. Between what potential difference did it travel?

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