Chapter 23 Coulomb's Law

Question 1

Field strength

Answer 1

E = F/Q (radial)
E = V/d (uniform field)

Question 2

Coulomb’s Law

Answer 2

Any two point charges exert an electrical force on each other that is proportional to the product of their charges and inversely proportional to the square of the distance between them

Question 3

Permittivity of free space

Answer 3

8.85 x 10-12 F m-1

Question 4

Coulomb’s law equation

Answer 4

F = kQ1Q2/r2

Question 5

What is k in Coulomb’s law equal to

Answer 5

1/4piepsilon

9.0 x 10^9 Nm^2C^-2

Question 6

Completed equation for coloumbs law

Answer 6

F = QQ/4pir2epsilon

Question 7

Electrical field strength in a radial field

Answer 7

E = Q/4pir^2epsilon

Question 8

Energy changes in a uniform field

Answer 8

W = QV

Question 9

Energy in a radial field

Answer 9

V = Q/4pirepsilon

Question 10

Electrical potential

Answer 10

At a point is equal to the work done in bringing unit positive charge from infinity to that point

Question 11

Field strength and potential gradient

Answer 11

Field strength = -potential gradient

E = deltaV/ delta d