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WalesElectronicsQuick questions
Component 1: Instrumentation and Timing Systems
Quick questions on Instrumentation systems: the Wheatstone bridge and signal conditioning - WJEC A-Level Electronics
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the Wheatstone bridge?Show answer
The bridge is ideal for resistive sensors because it gives zero output at the reference condition, so only the change is measured, and it cancels effects (like temperature) common to its arms.
What is calibration?Show answer
Calibration relates the conditioned output to the true value of the measured quantity, by comparing the system's reading against known standards and adjusting the gain and offset so the scale reads correctly.
What is q1?Show answer
State the output of a Wheatstone bridge when it is balanced, and what causes a non-zero output. [2 marks]
What is q2?Show answer
Give two functions performed by signal conditioning in an instrumentation system. [2 marks]
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