Electric and Gravitational Fields

Question 1

What is electric field strength?

Answer 1

force per unit charge

Question 2

What is the equation for electric field strength in uniform and radial fields?

Answer 2

F/Q

E=kQ/r^2

Question 3

What information do field lines give?

Answer 3

The direction and strength of the field

Question 4

State Coulomb’s Law

Answer 4

F=kQQ/r^2

Question 5

What does k =?

Answer 5

9x10^9 or 1/4piE0

Question 6

What is electric potential?

Answer 6

The work done to bring a + test charge from infinity to a point P per unit charge

Question 7

What is the equation for electric potential?

Answer 7

V=kQ/r

=Ep/Q

Question 8

What is the equation for electric potential energy?

Answer 8

Ep=kQQ/r

=VQ

Question 9

What is the equation for gravitational field strength?

Answer 9

F/Q

Question 10

State Newton’s Law of Gravitation

Answer 10

F=GMM/r^2

Question 11

What does G=?

Answer 11

6.67x10^-11

Question 12

What is the equation for gravitational field strength (g) in uniform and radial fields?

Answer 12

F/m

E=GM/r^2

Question 13

What is the equation for gravitational potential?

Answer 13

V=GM/r

=Ep/M

Question 14

What is the equation for gravitational potential energy?

Answer 14

Ep=GMM/r

=VM