Amassless spring is attached to a support at one end and has a 2.0 μc charge glued to the other end. a -4.0 μc charge is slowly brought near. the spring has stretched 1.2 cm when the charges are 2.2 cm apart. what is the spring constant of the spring? express your answer with the appropriate units.

k = 1.23*10^{4} N/m

Explanation:

calculation of force when springs are 2.2 cm apart

we know that

F = 148.76 N

spring force will balanced the coloumb force

kx = F

   = 1.23*10^{4} N/m

the answer is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.