Quick questions on Monitoring and measuring AC: peak, rms and frequency - SQA Higher Physics

3short 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 q1?

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An AC supply has a peak voltage of

10\ \text{V}

. Calculate its rms voltage. [2 marks]

What is q2?

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One cycle of an AC signal occupies

8.0\ \text{ms}

. Calculate its frequency. [2 marks]

What is q3?

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State why mains voltage is quoted as an rms value rather than a peak value. [1 mark]

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