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Solved exercise · level 1 of 5

Predict the current

Skills: Analyse

Statement

The circuit is ready, switch open. Measurements are hidden.

What current will flow once K1 is closed? (G = 5 V, R1 = 150 Ω)

Enter your prediction, then check: K1 closes and we compare.

Parametric exercise: the values change with every draw; these are one example.

3 hints from Bastaya available in the lab
Solution

I = 5 / 150 = 33.3 mA. Opening or closing K1 does not change R1, only whether current flows.

Course sheet of the chapter : Ohm's law & resistance

This chapter is covered by the paths: Discovery, General electricity

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
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R
rotate
C
chip brush
Esc
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drag background
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