Coulomb’s Law Calculator, Formula, Calculation with Example      

Coulomb’s Law Calculator :

Enter the Charges are.. in not equal, Charge 1 (q₁) in nC, Charge 2 (q₂) in nc, Distance (r) in mm, and you get the Force (F) in newton(N).

Coulomb’s Law Calculator

Coulomb’s Law Formula :

Coulomb’s law formula Electrostatic force F(N) in Newton is equal to the coulomb’s constant ke(N-m2/c2) in Newton per meter2 per coulomb’s2 and multiply the magnitude of the first and second  charge and expressed  q1, q2(c) in coulomb’s and multiply square of the distance between objects r2(m) in meter. Hence the coulomb’s law formula can be written as

F(N)=  ke(N-m2/c2) * q1(c) * q2(c) / r2(m)

Where,

F=Electrostatic Force between charges and expressed in units Newtons

q1 =  magnitude of first charge and expressed in units coulombs

q2 = magnitude of second charge and expressed in units coulombs

r=shortest distance between objects with units m

Ke= coulomb’s constant and is equal to 8.98755 * 109  N-m2/ c2

Example:1

Calculate the force value? In a charge  150 0C and distance 2 *10-08 m.

Answer:

Charge (q1 & q2 ) =150 0c

Convert distance 20 nm into m

As Distance is in nanometer convert it into meter 1 meter =1000000000

Distance =20/1000000000

Distance =20 *10-08 m

Force = F=  ke * q1 * q2 / r2

F= 8.98755 *109 * 150 0c / (20 *10-08)2

Force=5.055496 *10-29 N

Example:2

Calculate the force value? In a charge  480 0C and distance 90 nm.

Answer:

Charge (q1 & q2 ) =480 0c

Convert distance 90 nm into m

As Distance is in nanometer convert it into meter 1 meter =1000000000

Distance =90/1000000000

Distance =90 *10-08 m

Force = F=  ke * q1 * q2 / r2

F= 8.98755 *109 * 480 0c / (90 *10-08)2

Force=2.5564  *10-29 N

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