What is the definition of electric field strength?
Electric field strength is defined as the force experienced per unit charge.
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What is the formula for electric field strength in a uniform field?
E = electric field strength (V m-1)
V = potential difference (V)
d = distance (m)
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What is the formula for electric field strength in a radial field?
E = electric field strength (V m-1)
ϵ0= permittivity of free space = 8.85 x 10-12 (F m-1)
Q = charge (C)
r = distance (m)
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How does electric field strength vary in a uniform field?
The electric field strength is the same at all points in a uniform field.
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How does electric field strength vary in a radial field?
As distance increases electric field strength decreases.
The relationship between electric field strength and distance follows an inverse-square relationship.
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How can field lines be used to visualise electric field strength?
A higher electric field strength can be visualised by a greater density of field lines.
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How do field lines represent the direction of the electric field?
Field lines point in the direction that a positive test charge would move if placed in the field.
They point away from positive charges and towards negative charges.
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