An electron with kinetic energy of 2000 eV (1 eV = 1.602 x 10-19 J) is fired horizontally across a horizontally oriented conducting plate with a surface charge density +4.00 x 106 C/m2. Taking the positive direction to be upward (away from the plate), what is the vertical deflection of the electron after it has travelled a horizontal distance of 4.00 cm?

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

Select all the correct answers.which two statements are true? a moving magnetic field creates an electric field.a constant magnetic field creates an electric field.a constant electric field creates a magnetic field.a moving electric field creates a magnetic field.resetnext

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?