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Topic 9 electric fields
Physics cards
5
Physics
12th Grade
06/27/2017

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Cards

Term

[image]

Field lines

 

Definition

Show direction of force acting on stationary charge in a field 

- never cross 

- spacing proportional to field strength 

arrows show direction 

Term
Electric field strength
Definition

Force per unit positive charge in an electric field

SI unit: N/C

E=F/Q where E=change in v/change in d

Term

[image]

Uniform electric fields

Definition

 

Force on a charge in a uniform field is the same everywhere

E= change in p.d. Across plates/ plate separation

Unit: V/m or N/C

Term
Motion of charged particles in a field[image]
Definition

+ve charge moves in direction of field

-ve charge moves against direction of field

follows parabolic path when fired perpendicular to field 

path before/after is straight as no resultant force is acting 

Term
Coulomb
Definition
Charge flowing per second past a point in a circuit with a current of 1 ampere
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