Elec Class

learn electricity hands-on
0 1 / 20

Solved exercise · level 1 of 5

Junction rule

Skills: Know

Statement

At a junction, Kirchhoff's law states that...

  1. The sum of incoming currents equals the sum of outgoing currents
  2. All currents are equal
  3. The sum of voltages is zero
  4. The largest current wins
2 hints from Bastaya available in the lab
Solution

Charge conservation: nothing piles up at a junction, ΣI in = ΣI out.

Course sheet of the chapter : Kirchhoff's laws

This chapter is covered by the paths: General electricity, Measurement prep

Other exercises of the chapter

Simulated time00:00:00
Q = I·t-
W = P·t-

Circuit diagram CEI 60617

How does it work?

Each big hole is a circuit node: you push one leg of a component into it. The 4 small holes around it are connected to it: chips and leads plug in there.

  1. Place a component Drag it from the palette: it snaps onto the grid. R rotates it.
  2. Bridge neighbouring holes Pick the jumper chip (or C) and drag on the board: bridged holes become a single node.
  3. Draw a lead For long links and the power supply: from one big hole to another, or to a terminal.
  4. Close the loop The circuit is solved live (Ohm, Kirchhoff) and the diagram follows.

Shortcuts

Del
delete
R
rotate
C
chip brush
Esc
cancel
wheel
zoom
0
fit the board
drag background
pan

Confirmer

Renommer

Importer un montage

Export