Electric Fields (Leaving Cert Physics): Flashcards

Region of space where charged particle experiences electric force

Vector (has magnitude and direction)

Force direction on positive test charge

Stronger electric field

Start on positive, end on negative charges

Never

$E = \frac{F}{q}$

N C⁻¹ (newtons per coulomb)

Force per unit charge

$E = k\frac{Q}{r^2}$

$k \approx 9.0 \times 10^9$ N m² C⁻²

Field lines radiate outward uniformly

Field lines point inward from all directions

Uniform with constant field strength

Decreases with square of distance