Draw the symbol for an AND gate.
Describe the action of an AND gate in terms of its inputs and outputs.
A safety-system designer wishes to install a hazard-prevention system for a heavy hydraulic press. The press must only operate if the operator presses two separate activation buttons simultaneously, ensuring both hands are clear of the machinery. An AND gate is to be used in the design of this system. Describe suitable input and output arrangements for the gate.
136 exam-style questions on CIE IGCSE Physics 4.3 Electric circuits, covering 4.3.1a Circuit diagrams and circuit components, 4.3.2a Series circuits, 4.3.2b Parallel circuits, 4.3.2c Current and potential difference in circuits, 4.3.2d Combined resistance of resistors in parallel, and 4.3.3 Action and use of circuit components. Each one has a worked solution and a mark scheme showing where the marks go.