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Planar charged electrodes guide electrons

Cathode Ray Tube

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Application of Electric Fields: E-Ink

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An Expert in Electric Fields

Electric eel

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Field Lines Around Eel’s Body

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Ampullae of Lorenzini: Shark Electric Field Sensors

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Charges Influence Surrounding Space

http://phet.colorado.edu/sims/charges-and-fields/charges-and-fields_en.html

http://www.falstad.com/vector3de/

http://www.cco.caltech.edu/~phys1/java/phys1/EField/EField.html

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We believe in electric fields as physically real because there is an influence that can be independent of the particle that created the field .

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Field Lines of Electric Dipole

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If I put a charged point particle (blue dot) on a field line, then the particle will move so as to follow the field line.

A TrueB False

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At which point is the electric field stronger?

A. Point A.

B. Point B.

C. Not enough information to tell.

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Can Electric Field Vectors Cross?

(A) Yes(B) No(C) No idea

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Which is the electric field direction at the black dot?

E. None of these.

Slide 25-101

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What is the direction of the electric field at the dot?

E. None of these.

Slide 26-22

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Can Electric Field Lines Cross?

(A) Yes(B) No(C) No idea

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At the dot, the y-component of the electric field due to the shaded region of charge is

A.

B.

C.

D.

E.

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A

B

C

D

What is EE field magnitude at point P distance y from midline of two infinite charged lines

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Which dipole experiences no net force in the electric field? A.

B.

C.

A. Dipole A.

B. Dipole B.

C. Dipole C.

D. Both dipoles A and C.

E. All three dipoles.

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Which dipole experiences no net torque in the electric field?

A. Dipole A.

B. Dipole B.

C. Dipole C.

D. Both dipoles A and C.

E. All three dipoles.

Slide 26-90

A.

B.

C.