I'm very new to electronics and am playing around with different combinations of resistors and LEDs trying to master the concepts behind series and parallel circuits. For instance, creating circuits with known resistance values on a bread board, then calculating voltage and current and different points in the circuit, then using a multimeter to see if the real world observed values match my calculations.
The circuit below has me stumped, and I'm not sure how to approach it. I begin by calculating the combined resistance of the parallel section of the circuit as:
1 / (1/220 + 1/470) ~= 150 Ω
and total resistance on the circuit is therefore 620 Ω.
Voltage drop across R1 should be 470/620 * 9 = 6.8v, and voltage drop across the parallel section should be 2.2v. This is where I think I go wrong because my calculations for each branch of the parallel circuit aren't internally consistent. Also my observed values are more like 5.7v and 3.3v.
Can anyone help?
The circuit below has me stumped, and I'm not sure how to approach it. I begin by calculating the combined resistance of the parallel section of the circuit as:
1 / (1/220 + 1/470) ~= 150 Ω
and total resistance on the circuit is therefore 620 Ω.
Voltage drop across R1 should be 470/620 * 9 = 6.8v, and voltage drop across the parallel section should be 2.2v. This is where I think I go wrong because my calculations for each branch of the parallel circuit aren't internally consistent. Also my observed values are more like 5.7v and 3.3v.
Can anyone help?
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