1. An electron and a proton have charges of an equal magnitude but opposite sign
ID: 2128160 • Letter: 1
Question
1. An electron and a proton have charges of an equal magnitude but opposite sign of 1.60 10-19 C. If the electron and proton in a hydrogen atom are separated by a distance of 8.00 10-11 m, what are the magnitude and direction of the electrostatic force exerted on the electron by the proton?
magnitude ________ N
direction--> attractive/repulsive??
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2. A test charge of +8.00 10-6 C experiences a downward electrostatic force of 11 N when placed at a certain point in space. What are the magnitude and direction of the electric field at this point?
magnitude _______ N
direction up/down??
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3. Two positive charges, each of magnitude 3. 10-6 C, are located a distance of 4 cm from each other.
(a) What is the magnitude of the force exerted on each charge?
_______ N
(b) On a drawing, indicate the directions of the forces acting on each charge.
______________________________________________________________________________________
4. A charge of -3.50 10-6 C is placed at a point in space where the electric field is directed toward the right and has a magnitude of 7.50 104 N/C. What are the magnitude and direction of the electrostatic force on this charge?
magnitude _______ N
direction right/up/left/down??
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5. Two charged particles exert an electrostatic force of 5 N on each other. What will the magnitude of the electrostatic force be if the distance between the two charges is reduced to one-half of the original distance?
___________ N
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6. A charge of +5.00 10-6 C is located 11 cm from a charge of -4.00 10-6 C.
(a) What is the magnitude of the force exerted on each charge?
_________ N
(b) On a drawing, indicate the directions of the forces acting on each charge.
Explanation / Answer
The force between charged objects is given by the Coulomb's Law:
F = kQq / r^2
k - constant (9x10^9 Nm^2 /C^2)
Q and q - charges measured in coulombs
r - distance between the charges measured in meters
Plug and chug (your answer should be 3.0x10^-8 N)
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