Electric Field Lines and Electropotential Lines\Surfaces

1. Electric Field Lines and Electropotential Lines\Surfaces

2. Electric Field Lines • All 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.

3. 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.

4. Equipotential Surfaces for a Dipole • The equipotential surfaces for a dipole would look those appearing in the figure to the right.

5. Procedure 1: Multimeter/Probes Procedure 3 – Parallel Plate Capacitor Procedure 1: Voltage Measurement Procedure 4 - Electric Field Conducting Ring I Procedure 1 – Equipotential Surfaces/Lines Procedure 4 - Electric Field Conducting Ring II Procedure 1 - Plotting Equipotential Lines/Surfaces Procedure 5 - Electric Field Capacitor with Insulator Procedure 2 - Plotting Electric Fields Procedure 5 - Electric Field Like Charged Dipole

6. OFF 1000 750 200 2704C 2706B 200 20 20 BK PRECISION BK PRECISION 2000m 2000m 200m 200m TOOL KIT TOOL KIT MAX/MIN HOLD 200 40kHz OFF 1000 750 20m 200 200 200 20 20 20m 200m 2 2 200m 200m 200 200m 750 20m 200 200 10A 10A 2m 200 200m 200m 200 1400 Hz 20M 200k 200 2k F Logic 200 2K 20 2 200K 200n 20M C ~ ~ A A W A A PNP 20n 2000M PNP 2n F F hFE ~ ~ V V V V W TYPE K MAX/MIN Procedure 1: Multimeter DC Voltage DC Current Resistance

7. OFF 1000 750 200 200 20 20 2000m 2000m 200m 200m 2706B 200 40kHz BK PRECISION 20m 200 TOOL KIT 20m 200m 200m 200 750 20m 2m 200 200 1400 20M 200k 200 2k F C ~ A A ~ V V F MAX/MIN W TYPE K Procedure 1: Probes 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

8. OFF 1000 750 200 200 20 20 2000m 2000m 200m 200m 2704C 2706B MAX/MIN HOLD 200 40kHz OFF BK PRECISION BK PRECISION 1000 750 20m 200 200 200 20 20 TOOL KIT TOOL KIT 20m 200m 2 2 200m 200m 200 200m 750 20m 200 200 10A 10A 2m 200 200m 200m 200 1400 Hz 20M 200k 200 2k F Logic 200 2K 20 2 200K 200n 20M C ~ ~ A A A A PNP 20n 2000M PNP 2n hFE ~ ~ V V V V W F F MAX/MIN W TYPE K Procedure 1: Voltage Measurement Return

9. PK-9025 CONDUCTIVE PAPER centimeter grid 20 18 16 14 12 10 8 6 4 PASCO scientific 2 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 Procedure 1- Equipotential Surfaces/Lines A B C D E F G H I Return

10. Procedure 1 - Plotting Equipotential Lines/Surfaces B C Return

11. a b c d e Procedure 2 - Plotting Electric Fields

12. Procedure 2 - Plotting Electric Fields B C Return

13. Procedure 3 – Parallel Plate Capacitor a b c H I d e Return

14. Procedure 4 - Electric Field Capacitor with Insulator a b c D E d e Return

15. Procedure 4 - Electric Field Electric Field Conducting Ring a b c F G d e Return

16. A B C Procedure 4 - Electric Field Like Charged Dipole a c b d Return

17. Procedure 4 - Electric Field Conducting Ring c b c’ d b’ d’ a a’ F G e’ g’ f’ e g f Return

18. e-

19. + - Scale: 2 Squares = 1 cm