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An electron moves in a uniform magnetic field. At a particular instant the speed of the
electron is 3.0x10^(6) m/s and the magnitude of the magnetic force acting on it is
5.0x10^(-13) N. The velocity of the electron makes an angle of 30o with the direction of
the magnetic field. Calculate the magnetic field strength at that instant.
Two-point charges are arranged on the x-y coordinate system as follows: q1= 4 x 10^-8 C at (0,3 m) and q2= -9 x 10^-7 C at (5,0 m). Find the electric origin at (0,0). Using the Pythagorean theorem calculate for the magnitude E of the resultant electric field.
What is the magnitude and direction of the electric field at .35 m from a -6.5 x 10^-8 C point charge?
How is an electric field produced by an object with an electric charge?
How do charged bodies interact with other charged bodies?
The human hair is comb using a rubber comb. What charge acquired by the hair and by the comb?
Two particles A and B are released from rest, having equal charges of -8 x 10
^-6 C and initially separated from each other by 0.025 m. The masses of particles A and B are 6.25 X 10^-6 KG AND 3.75 X 10^-6 kg. Find the magnitude of the initial accelerations of particles A and B.
Sphere A has a charge of +10.0 C. It is brought in contact with a neutral sphere B and then separated. Find the final charges on Spheres A and B if,
a) the sphere have equal radius and
b) if the radius of sphere B is twice the radius of Sphere A
3. A ball is thrown vertically upward with a speed of 30 ft/s from the edge of a cliff 50 ft above sea level with what velocity with it hit the water?
a. 32.2 ft/s b. 58.6 ft/s c. 64.2 ft/s d. 52.3 ft/s
If in the process oof rubbing the lenses of the eyeglasses, 6.28 x 10^10 electrons were transferred,
a) what is the charge of the lenses and the nylon cloth?
b) what is the change in their masses?
