Electric Field Lines and Electropotential Lines\Surfaces

Electric Field LinesAll electric charges have invisible electric field lines surrounding them.The source of these lines is uncertain; however, they are definitely present.The electric field lines of a positive charge radiates outward in all directions from the charge.The electric field lines of a negative charge radiates inward from all directions.A positive charge released in the vicinity of an electric charge would move in the direction indicated by the direction of the electric field lines.Negative charges would move in the opposite direction as the electric filed lines.

Equipotential Surfaces

The red lines on this slide are electric field lines.Equipotential Surfaces indicate positions in an electric field where the electric potential (Voltage) is constant.These equipotential surfaces within a uniform electric field are indicated by the blue lines in the figure to the right.The equipotential surfaces about an isolated point charge would be as shown.

Equipotential Surfaces for a DipoleThe equipotential surfaces for a dipole would look those appearing in the figure to the right.

Procedure 1:Multimeter/Probes

Procedure 1: Voltage Measurement

Procedure 1 – Equipotential Surfaces/Lines

Procedure 5 - Electric Field Capacitor with Insulator

Procedure 2 - Plotting Electric Fields

Procedure 3 – Parallel Plate Capacitor

Procedure 4 - Electric Field Conducting Ring I

Procedure 5 - Electric Field Like Charged Dipole

Procedure 1 - Plotting Equipotential Lines/Surfaces

Procedure 4 - Electric Field Conducting Ring II

1000OFF

20020

2200m

750200

202

200m

200m

2K

200

200K

20M20n

2nPNP

PNP

Logic

200n

2

20

20010A

Hz

2000M

200m

20010A

hFE

MAX/MIN HOLD

1000OFF

200202000m200m

750200

202000m

200m

200

20m

200m

750

200

200

1400

40kHz

20M200k 2k 200

200

20m

200m

2002m

20m

MAX/MIN

1000OFF

200202000m200m

750200

202000m

200m

200

20m

200m

750

200

200

1400

40kHz

20M200k 2k 200

200

20m

200m

2002m

20m

MAX/MIN

This slide shows you how to remove the caps from the probes and insert them into the multimeter. When you remove them from the probes, place them in the Laboratory kit to avoid loosing the caps.

Return

1000OFF

20020

2200m

750200

202

200m

200m

2K

200

200K

20M20n

2nPNP

PNP

Logic

200n

2

20

20010A

Hz

2000M

200m

20010A

hFE

MAX/MIN HOLD

1000OFF

200202000m200m

750200

202000m

200m

200

20m

200m

750

200

200

1400

40kHz

20M200k 2k 200

200

20m

200m

2002m

20m

MAX/MIN

Return

0

2

20

18

16

14

12

10

8

6

4

2 201816141210864 22 24 26 28

A

B C ED

IHGF

Procedure 1- Equipotential Surfaces/Lines

Return

Procedure 1 - Plotting Equipotential Lines/Surfaces

B C

Return

Procedure 2 - Plotting Electric Fields

a b

c

de

Procedure 2 - Plotting Electric Fields

B C

Return

Procedure 3 – Parallel Plate Capacitor

IH

a

b

c

d

e

Return

Procedure 4 - Electric Field Capacitor with Insulator

a

b

c

d

e

ED

Return

Procedure 4 - Electric Field Electric Field Conducting Ring

a

b

c

d

e

GF

Return

Procedure 4 - Electric Field Like Charged Dipole

A

B C

a

b

c

d

Return

Procedure 4 - Electric Field Conducting Ring

a

bc

d

GF

Return

gf

e

a’

g’ f’e’

d’c’b’

e-

Scale: 2 Squares = 1 cm

+ -