lecture 15-2-1

# lecture 15-2-1 - Chapter 15 Electric Forces and Electric...

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Chapter 15 Electric Forces and Electric Fields

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Electrical Field Maxwell developed an approach to  discussing fields An  electric field  is said to exist in the  region of space around a charged  object When another charged object enters this  electric field, the field exerts a  force  on the  second charged object
Electric Field, cont. A charged particle, with  charge Q, produces an  electric field in the  region of space around  it A small  test charge , q o placed in the field, will  experience a force

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Electric Field Mathematically, SI units are N / C Use this for the magnitude of the field The electric field is a vector quantity The direction of the field is defined to be the  direction of the electric force that would be  exerted on a small positive test charge placed  at that point 2 e o k Q q r = = F E r r
Direction of Electric Field The electric field  produced by a  negative charge is  directed toward the  charge A positive test  charge would be  attracted to the  negative source  charge

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