he classic Millikan oil drop experiment was the first to obtain an accurate measurement of the charge on an electron. In it, oil drops were suspended against gravity by a vertical electric field. Assume the oil drop to be 2.30 um in radius and have a density of 934 kg/m3. a) Find the weight of the drop. b) If the drop has a single excess electron, find the magnitude of the electric field strength needed to balance its weight.

he classic Millikan oil drop experiment was the first to obtain an accurate measurement of the charge on an electron. In it, oil drops were suspended against gravity by a vertical electric field. Assume the oil drop to be 2.30 um in radius and have a density of 934 kg/m3. a) Find the weight of the drop. b) If the drop has a single excess electron, find the magnitude of the electric field strength needed to balance its weight.

Similar questions

Raindrops acquire an electric charge as they fall. Suppose a 2.5-mm-diameter drop has a charge of +15 pC; these are both typical values. If the strength of the earth’s electric field is 100 N/C, how does the magnitude of the electric force on the droplet compare to the weight force?
3. Charge is distributed uniformly over the plane y = -5 cm with a surface charge density of 1/36 nC/m². Find the Electric field intensity. A Find the charge in th e volumo dofined hy 0
This is a two part problem. An infinite slab of thickness 2z-nought lies in the xy-plane between z = -z-nought and z = z-nought. The volume charge density, rho, is constant. a) Find an expression for the electric field inside the slab. b) Find an expression for the electric field above the slab.
Help me answer this An a particle (the nucleus of a helium atom) has mass of 6.64×10^-27kg and charge of q = 2e . Compare the magnitude of the electric repulsion force between two a particles with that of the gravitational attraction between them by getting the ratio F e / F 0. HINT: Convert the given charge into Coulombs.
Assume you have a line of positive charge with a linear charge density of 10.0 µC/m. Assume that this line of charge is infinitely long and lies on the z-axis (which is perpendicular to both the x- and y-axes). a) Find the strength and direction of the electric field associated with this line of charge at (0.5 m, 0 m, 0 m) The strength of the field at the stated point is N/C and the direction of the field at the stated point is O-x O+x O-y O+y O-z O+z b) Find the strength and direction of the electric field associated with this line of charge at (0 m, 0.5 m, 5 m) The strength of the field at the stated point is N/C and the direction of the field at the stated point is O-x O+x O-y O+y O-z O+z c) Find the strength and direction of the electric field associated with this line of charge at (2.0 m, 0 m, Om) The strength of the field at the stated point is N/C and the direction of the field at the stated point is O-x O+x O-y O+y O-z O+z
The classic Millikan oil drop experiment was the first to obtain an accurate measurement of the charge on an electron. In it, oil drops were suspended against gravity by a vertical electric field. microscope Assume the oil drop to be 1.90 µm in radius and have a density of 922 kg/m3. (a) Find the weight of the drop. N (b) If the drop has a single excess electron, find the magnitude of the electric field strength needed to balance its weight. N/C
A simple and common technique for accelerating electrons is shown in the figure below, where a uniform electric field is created between two plates. Electrons are released, usually from a hot filament, near the negative plate, and there is a small hole in the positive plate that allows the electrons to continue moving. O (a) Calculate the acceleration of the electron if the field strength is 7.96 x 10¹ N/C. m/s² (b) Why will the electron not be pulled back to the positive plate once it moves through the hole? O The force of gravity is too strong. The other side of the positive plate also has a negative charge. There is no field outside the plates.
A housefly walking across a clean surface can accumulate a significant positive or negative charge. In one experiment, the largest positive charge observed was +73 pC. A typical housefly has a mass of 12 mg. What magnitude and direction electric field would be necessary to “levitate” a housefly that has the maximum charge? Could such a field exist in air?
Needs Complete typed solution with 100 % accuracy.
(a) What is the electric field 2.1 m from the center of the terminal of a Van de Graaff with a 9.90 mC charge, noting that the field is equivalent to that of a point charge at the center of the terminal? N/C (b) At this distance, what force does the field exert on a 2.50 μC charge on the Van de Graaff's belt? N
P9 E4
The classic Millikan oil drop experiment was the first to obtain an accurate measurement of the charge on an electron. In it, oil drops were suspended against gravity by a vertical electric field. GI Assume the oil drop to be 2.20 μm in radius and have a density of 957 kg/m³. (a) Find the weight of the drop. N + microscope (b) If the drop has a single excess electron, find the magnitude of the electric field strength needed to balance its weight. N/C