This is a circuit board. It has two light bulbs.
Question: after switching on, which light bulb is lighter? which is dimmer?
Answer: They are almost the same. Because the current flows through each light bulb is the same.1.5V
Question: after switching on, which light bulb is lighter? which is dimmer?
Answer: They are almost the same. Because the current flows through each light bulb is the same.
We also draw the circuit diagram on white board and measure the current using ammeter to verify our results are correct.
The colorful resistors have different resistance depending on each segment's color.
Here is the chart for calculating the resistor.
We calculate the resistance according to the chart. And we measure the resistor using ammeter to verify it is correct.
Finally, we find the sum of parallel/series circuit and deduct the rule for calculating them.
For n resistors in series, R(eq)=R1+R2+...Rn
For n resistors in parallel, R(eq)=1/(1/R1+1/R2+1/R3+...1/Rn)
What if we have a circuit combined with parallel loop and series loop?
1.Assign circuit
2.Apply loop rule:
We always draw loop from negative pole of the charge to the positive pole of the charge.
3. Apply current rule
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