More Lessons for IGCSE Physics
A series of free GCSE/IGCSE Physics Notes and Lessons.
Relays, LDRs and Thermistors
In this lesson, we will learn about components like LDRs, thermistors and diodes, and their use in relays and rectifiers.
LDRs, thermistors and diodes, and their use in relays and rectifiers
Suitable for IGCSE and GCSE revision.
Logic Gates and Relay Circuits
OCR Gateway P6 Q15 - GCSE Physics Revision
How to protect circuit boards from high currents by separating parts of circuits using a relay switch. This means a second circuit with low current which operates the circuit with the higher current.
Bill has a programmable washing machine.
A combination of logic gates controls the motor in the washing machine.
The motor in the washing machine runs on a 230 V mains voltage.
He draws a diagram to show how the circuits in the washing machine should be connected.
Look at the diagram.
Connecting the washing machine as shown in the diagram will not work.
Explain why and how the circuits should be connected.
Try the free Mathway calculator and
problem solver below to practice various math topics. Try the given examples, or type in your own
problem and check your answer with the step-by-step explanations.
We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.