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Coulombs Law

Total questions: 10

Worksheet time: 10mins

Name
Class
Date
1.
The Electric Force is strongest when charges are...
a)
close together
b)
far apart
c)
the electric force is constant everywhere
2.

Which is the value of the constant in Coulomb's equation?

a)

k = 9·10-9

b)

k = 9.8

c)

k = 6.67·10-11

d)

k = 9 ·109

3.

Find the magnitude of the force between two charges of 1.0 C each which are 1.0 meter apart?

Answer given to two sig fig, type powers as 6.6E-6 for 6.6x10-6 NO UNIT!

(a)  

4.
What happens to the force between two charged objects if you triple the magnitude of one charge? 
a)
1/3X
b)
3X
c)
1/9X
d)
9X
5.
What happens to the force between two charged objects if you reduce the distance between two objects from 30 cm to 10 cm?
a)
1/3X
b)
20X
c)
3X
d)
9X
6.
What happens to the force between two charged objects when you triple the magnitude of both charges?
a)
3X
b)
6X
c)
9X
d)
1/6X
7.
The distance between two charges doubles at the same time that the charge on each also doubles.  What happens to the electric force?
a)
doubles
b)
quadruples
c)
cut in half
d)
no change
8.

Calculate the force exerted between two charged objects separated by a distance of 0.6 m. One object has a charge of -5 C and the other has a charge of +2.0 C.
Answer given to two sig fig, type powers as 6.6E-6 for 6.6x10-6 NO UNIT!

(a)  

9.

Calculate the force between and electron and proton in a hydrogen atom, the electron orbits the proton at a distance of 1.0x10-10 m.

Answer given to two sig fig, type powers as 6.6E-6 for 6.6x10-6 NO UNIT!

(a)  

10.

Calculate the force between two protons inside a nucleus 1.0x10-15 m apart.
Answer given to two sig fig, type powers as 6.6E-6 for 6.6x10-6 NO UNIT!

(a)