Chapter 5- Electrostatics And Magnetism

Question 1

Coulomb’s law

Answer 1

Fe = kq1q2 / r^2

k- 8.99 x 10^9

Question 2

Magnitude of electric field

Answer 2

E = Fe/q = kQ/r^2

Question 3

Electrical potential energy

Answer 3

U= kQq/r

+ if two charges are the same and - if they are different

Question 4

Electrical potential

Answer 4

U/q (ratio of magnitude of charge and its electrical potential energy) -measured in volts

Question 5

Electrical potential with no test charge present

Answer 5

V= kQ/r

Question 6

🔺Voltage

Answer 6

Wab/ q (Wab is work needed to move a test charge q)

Potential difference between two points at different points

Question 7

Electric potential

Answer 7

V= (kqd/r^2) cos

Question 8

Dipole moment (p)

Answer 8

p= qd

Production of charge and separation distance

Question 9

Net torque on a dipole

Answer 9

pEsin

Question 10

SI unit for magnetic field strength

Answer 10

Tesla (T)

Gauss may also be used. 1T = 10^4 gauss

Question 11

Order of magnetic strength

Answer 11

1. Ferromagnetic (lots of unpaired electrons)
2. Paramagnetic(unpaired electrons)
3. Diamagnetic (no unpaired electrons)

Question 12

Magnetic field produced by straight current carrying wire

Answer 12

B= u*I/2pir

u*- 4pi x 10^-7

Question 13

Magnetic field for center of circular loop of current carrying wire

Answer 13

B= u*I/2r

Question 14

Lorentz force

Answer 14

Sum of both electrostatic and magnetic forces acting on a charge

Question 15

Magnetic force exerted on a charge moving in a magnetic field

Answer 15

FB= qvB sin

B- magnitude of magnetic field

Question 16

Magnitude of force created by external magnetic field for a straight wire

Answer 16

FB= ILB sin