Combinations of logic gates are used when digital signals are processed.
Describe the difference between a digital signal and an analogue signal.
The table below is the truth table for a logic gate X.
input Ainput Boutput001011101110 \begin{array}{|c|c|c|} \hline \text{input A} & \text{input B} & \text{output} \\ \hline 0 & 0 & 1 \\ \hline 0 & 1 & 1 \\ \hline 1 & 0 & 1 \\ \hline 1 & 1 & 0 \\ \hline \end{array} input A0011input B0101output1110State the name of logic gate X and describe the symbol that represents it.
Logic gate Y is identical to logic gate X. Describe how a combination of logic gates X and Y can be connected to behave like an AND gate. Label the inputs A and B, and label the final output Q.
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.