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The big question: How do Kirchoff’s laws link with voltage, resistance and electrolysis

The big question: How do Kirchoff’s laws link with voltage, resistance and electrolysis Why are we learning this? One use of electrolysis and Kirchoff’s laws is hair removal $45 / £35 per 30 minutes. Electrolysis… Match up the words to the definitions ( Wordwall ). equal.

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The big question: How do Kirchoff’s laws link with voltage, resistance and electrolysis

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  1. The big question: How do Kirchoff’s laws link with voltage, resistance and electrolysis Why are we learning this? One use of electrolysis and Kirchoff’s laws is hair removal $45 / £35 per 30 minutes

  2. Electrolysis… Match up the words to the definitions (Wordwall)

  3. equal

  4. Learning Objective: To combine understanding of Kirchoff’s laws with other concepts The big question: How do Kirchoff’s laws link with voltage, resistance and electrolysis A – Analyse circuits with different value resistors B – Predict currents using digital ammeters and Kirchoff’s laws C – Calculate current using same value resistors D – Investigate electrolysis

  5. Electricity ALWAYS takes the easiest route If electricity cannot take the easiest route, it equally divides Make up this circuit Predict what current will be at A and B Measure current in A and B A Same resistance B

  6. For these circuits, make them and test currents at A, B and C each time Also provide circuit diagrams A B A B C A B C C Provide an explanation for why changes each time

  7. Learning Objective: To combine understanding of Kirchoff’s laws with other concepts The big question: How do Kirchoff’s laws link with voltage, resistance and electrolysis A – Analyse circuits with different value resistors B – Predict currents using digital ammeters and Kirchoff’s laws C – Calculate current using same value resistors D – Investigate electrolysis

  8. So… This is a 12V cellCalculate currentat each point if… (C) R1=R2=R3, and at 8 there is 10A (B) R1 is twice R2 and R3 and at 8 there is 10A (B) R1=R2, R3=R1+R2. At 8 there is 12A.

  9. So… (A) This is a 12V cellCalculate the Relative valuesof R1, R2 and R3, if 4 is 5A, 3 is 15A and 2 is 20A 4 is 12A, 3 is 18A and 2 is 21A

  10. So… (A) This is a 12V cellCalculate the Relative valuesof R1, R2 and R3, if 4 is 5A, 3 is 15A and 2 is 20A 4 is 12A, 3 is 18A and 2 is 21A

  11. Learning Objective: To combine understanding of Kirchoff’s laws with other concepts The big question: How do Kirchoff’s laws link with voltage, resistance and electrolysis A – Analyse circuits with different value resistors B – Predict currents using digital ammeters and Kirchoff’s laws C – Calculate current using same value resistors D – Investigate electrolysis

  12. How do you do it? A – You are given current for two resistors in parallel, and a voltage. You have to calculate the resistance B – You are given the different resistance of two resistors in parallel and a voltage. You have to calculate the current. C – You have two equal resistance resistors in paralell and a voltage. You have to calculate current

  13. Test next lesson Read up on digital ammeters (hwk) Ext: q1 jun 2009

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