Ch. 5 electrostatics and magnetism formulas

Question 1

Coulomb’s law

Answer 1

Fe= kq1q2/ (r^2)

Question 2

Electric field ( part of FUEV table)

Answer 2

E= F(e)/ ( q) ==== KQ/ r^2

Question 3

Electric potential energy ( part of FUEV table)

Answer 3

U= KQq/r

Question 4

Electric potential from electric potential energy

Answer 4

V= U/q

Question 5

Electric potential from source charge

Answer 5

V= KQ/r

Question 6

Delta Voltage

Answer 6

DELta V = Wab/ q.

Wab= Vb - Va

Question 7

Electric potential near a dipole

Answer 7

V= kqd/ r^2 * (cos theta)

Question 8

dipole moment = p

Answer 8

p = qd

Question 9

• Electric field on the perpendicular bisector of a dipole

Answer 9

E= 1/ (4piE0 * p /r^3)

Question 10

torque on a dipole in an electric field

Answer 10

T= pe * (sin theta )

Question 11

Magnetic field from a straight wire

Answer 11

B = u0* I / ( 2pi * r)

Question 12

magnetic field from a loop of wire

Answer 12

B= u0 I/ 2r

Question 13

Magnetic force on a moving point charge

Answer 13

FsubB= qvB (sin theta)

Question 14

Magnetic force on a current carrying wire

Answer 14

F= ILB sin theta