Electric field due to point charges and dipoles
Electric charges and fields · Physics
Electric field lab
Interactive 3DPlace charges and trace the field lines — like charges repel, opposites attract.
Controls
Drag the sliders or type a value — the simulation updates live.
µC
1µC10µC
Study notes
Calculate the electric field at a point 2 meters away from a point charge of 5 Coulombs. Step 1: Identify the formula E = k * Q / r^2. Step 2: Plug in the values. k is approximately 9 * 10^9 N m^2/C^2, Q is 5 C, and r is 2 m. Step 3: Calculate the square of the distance: 2^2 = 4. Step 4: Multiply k and Q: 9 * 10^9 * 5 = 45 * 10^9. Step 5: Divide by the squared distance: 45 * 10^9 / 4 = 11.25 * 10^9 N/C. The electric field is 11.25 * 10^9 N/C.