Quick questions on Passive RC filters, cut-off frequency and gain in decibels - Eduqas A-Level Electronics

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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A low-pass filter has

R = 4.7\ \text{k}\Omega

and

C = 100\ \text{nF}

. Find the cut-off frequency. [2 marks]

What is q2?

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Express a voltage gain of

\times 50

in decibels. [2 marks]

What is q3?

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State the output voltage fraction at the cut-off frequency of an RC filter. [1 mark]

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