Edexcel GCSE Design and Technology · 1DT0

Electrical Measurements and Calculations

What you need to know

Understand and apply the fundamental electrical units: current (amperes), resistance (ohms), and potential difference (volts).
Apply Ohm's Law formula to calculate electrical properties.

$V = I \times R$

R_{t o t a l} = R_{1} + R_{2} + R_{3}

$\frac{1}{R_{total}} = \frac{1}{R_1} + \frac{1}{R_2} + \frac{1}{R_3}$

Determine quantities by evaluating area and diameter measurements for relevant components.