A water droplet of mass 3.00 x 10-12 kg is located in the air near the ground during a stormy day. An atmospheric electric field of magnitude 6.00 x 103 N/C points vertically downward in the vicinity of the water droplet. The droplet remains suspended at rest in the air. What is the electric charge on the droplet?

The positive and negative plates of a parallel-plate capacitor have an area of 1.60 cm by 1.60 cm. Their surface charge densities are +1.00×10-6 C/m2and -1.00×10-6 C/m2, respectively. A proton moving parallel to the plates enters the middle of the space between them at a speed of 2.65×106 m/s. Assuming the field outside the capacitor is 0 and the field inside is uniform, how far to the side will the proton's path have deviated when it gets to the far end of the capacitor?

A small drop of water is suspended motionless in air by a uniform electric field that is directed upward and has a magnitude of 7010 N/C. The mass of the water drop is 4.36 × 10-9 kg. How many excess electrons or protons reside on the drop?

A total charge of 4.69 C is distributed on two metal spheres. When the spheres are 10.00 cm apart, they each feel a repulsive force of 4.1*10^11 N. How much charge is on the sphere which has the lower amount of charge?

A horizontal electron beam consists of electrons moving at 2000 m/s through two parallel, horizontal plates that are 0.01 m long and generate a uniform and constant 0.5 N/C electric field that points upward.  What is the vertical component of the electron's velocity upon exiting the field in m/s? Assume the plate separation is sufficient that you do not need to worry about the electrons hitting the plate.

What magnitude charge creates a 1.0 N/C electric field at a point 1.0 m away?

Singly-ionized helium contains two protons and one electron (there are also neutrons, but they have net zero charge and are not pertinent to this problem). Suppose the electron is located a distance of 2.65 × 10^-11 m from the nucleus. Place the nucleus at the origin of your coordinate system and the electron on the positive-x axis. What is the position on the x-axis at which the electric field is zero?

A particle of mass m = 1.0 g and charge 2.0 µC is placed in a region of space that has a constant electric field of magnitude 2000 N/C. What is the magnitude of the force exerted on the particle due to the electric field? O 4 x 103 N O 2N O 4N O 1000 N 2000 N O 4000 N 2 x 10° N O 1x 10° N

A point charge q1=5.00μC is held fixed in space. From a horizontal distance of 8.00 cmcm, a small sphere with mass 4.00×10^−3 kg and charge q2=+2.00μC is fired toward the fixed charge with an initial speed of 45.0 m/sm/s. Gravity can be neglected. What is the acceleration of the sphere at the instant when its speed is 22.0 m/sm/s?

A small, charged particle of mass 4.30 x 10-8g and charge +1.92 x 10-13C is sent toward a large fixed, flat sheet (0.50m x 0.50m) of metal that has a net charge of 1.33 x 10-6C. If the particle is moving with a speed of 18m/s when it is 8.00cm away from the sheet, does the particle strike the sheet? If so, what is the particle’s speed just before hitting the sheet? If the particle does not strike the sheet, what is its closest distance to the sheet?