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)
Question to be asking
ANSWER
What are the babyand the dog doing?
What is the facebook command it showsWhat is the voltage in the series circuit?
What is the voltage in the parallel circuit?
EQUAL
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 resistorsB – Predict currents using digital ammeters and Kirchoff’s lawsC – Calculate current using same value resistorsD – Investigate electrolysis
Electricity ALWAYS takes the easiest routeIf electricity cannot take the easiest route, it equally divides
Make up this circuitPredict what current will be at A and B
Measure current in A and B
A
B
Same resistance
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 whychanges each time
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 resistorsB – Predict currents using digital ammeters and Kirchoff’s lawsC – Calculate current using same value resistorsD – Investigate electrolysis
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.
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
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
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 resistorsB – Predict currents using digital ammeters and Kirchoff’s lawsC – Calculate current using same value resistorsD – Investigate electrolysis
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
Test next lessonRead up on digital ammeters (hwk)
Ext: q1 jun 2009