Advanced Higher Physics

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Advanced Higher Physics

• Electrical Field

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Electrical Field Strength 1

• E F/q (measured in NC-1)
• Defined as the force F acting per unit positive
  charge q placed at a point in the field

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Electrical Field Strength 2

• Examples
• Find the electric field strength, E, at a
  distance, r, of 1.5 m from a charge, Q, of 2.5
  nC.

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Electrical Field Strength 3

• 2. The electric field strength, E, is 3.8 NC-1
  at a distance, r, of 2.0 m.
• What is the size of the charge?

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Electric Field Diagrams 1

• We can draw the electric field in the region
  around a charge.
• For point charges the fields are radial.
• Arrows show the direction of force experience by
  a positive () charge.
• Spacing of arrows relates to field strength.

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Electric Field Problems

• Scholar Examples
• Scholar Demo

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Electric Field Diagrams 2

• Fields between like charges
• Fields between like charges

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Electric Field Diagrams 3

• Fields around charged plates

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Electric Field Diagrams 4

• Field between oppositely charged plates
• This is a parallel or
• uniform field.
• Field strength is equal
• at all points inside field