# Edexcel Physics Radial fields (Flashcards)

HideShow resource information
• Created by: Reductito
• Created on: 09-09-13 18:43
What is the equation for the electric field strength of radial fields?
Electric field strength = constant k x charge / radius squard (E = kQ / r^2)
1 of 5
When drawing a radial electric field, what three things should you remember?
You should draw at least 4 lines, the lines should be an equal distance away from each other and arrows should be included/
2 of 5
What is the field strength at a point 2 cm from a charge of 2x10^-6 in air? (k = 9x10^9)
E = kQ / r^2 = 9x10^9 x 2x10^-6 / 0.02^2 = 4.5x10^7 N
3 of 5
What is Coulomb's Law and what does it apply to?
E = kQ1Q2 / r^2. It is used when calculating the electric field strength of radial fields.
4 of 5
What other equation is Coulomb's Law very similar to?
The law of gravitation F = Gm1m2 / r^2.
5 of 5

## Other cards in this set

### Card 2

#### Front

When drawing a radial electric field, what three things should you remember?

#### Back

You should draw at least 4 lines, the lines should be an equal distance away from each other and arrows should be included/

### Card 3

#### Front

What is the field strength at a point 2 cm from a charge of 2x10^-6 in air? (k = 9x10^9)

### Card 4

#### Front

What is Coulomb's Law and what does it apply to?

### Card 5

#### Front

What other equation is Coulomb's Law very similar to?