Quick questions on Potential dividers - WJEC GCSE Electronics (3)

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 not rounding to a preferred value?

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A designed resistor must be rounded to the nearest real (E24) value, then the output re-checked.

What is algebra slips when rearranging?

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Cross-multiply carefully when solving for an unknown resistor.

What is q1?

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A divider has two equal

10\,\text{k}\Omega

resistors across a

6.0\,\text{V}

supply. State the output voltage. [1 mark]

What is q2?

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A divider with

R_1 = 4.0\,\text{k}\Omega

and

R_2 = 2.0\,\text{k}\Omega

is across a

9.0\,\text{V}

supply, output across

R_2

. Calculate the output. [2 marks]

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