# D.C Circuit for O Level Physics – What’s tested

In this post, let’s look at what’s tested in detail for D.C circuit for O Level physics.

I go through the points in detail in my video here.

This is a chapter with mainly calculations, hence, knowing all the formulae is essential. You can find a list of formulae for O Level Physics here.

Below is a checklist of what you need to know for O Level Physics on the topic current electricity.

## Checklist for D.C Circuit for O Level Physics

✓ draw circuit diagrams of:

• power sources (battery, d.c. supply or a.c. supply)
• switches
• lamps
• resistors (fixed and variable)
• potentiometer
• fuses
• ammeters
• voltmeters
• bells
• light- dependent resistors (LDR)
• thermistors
• light- emitting diodes (LED)

✓ series circuit: finding current, potential difference and effect resistance

✓ parallel circuit: finding current, potential difference and effect resistance

✓ Using V = RI in calculations involving circuit

✓ describe the action of a potentiometer

✓ describe the action of thermistors and light-dependent resistors and apply them to scenarios

✓ solve simple circuit problems involving thermistors and light-dependent resistors

Watch the video below to learn D.C circuit in detail.

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