For the circuit shoen with R1=R2=R3=330 Ohms ,V1=V2=5V .What is the volatage at D1 when the switch is closed?Use correct units and give your answer to 2 SF?
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For the circuit shoen with R1=R2=R3=330 Ohms ,V1=V2=5V .What is the volatage at D1 when the switch is closed?Use correct units and give your answer to 2 SF?
We can't figure out what you are did wrong unless you show us what you did. Having said that, the statement V1=R1+R3 is nonsensical as it equated a voltage to a resistance. Also, when you say that you did it to find the I, you give no indication what I is. Is it the current in the flowing to the right in R1? The current flowing upward in R2? The current in the Euphrates River? You need to clearly define the terms you use.I tried using kvl on V1=R1+R3 to find the I,current
Wonderful. But I'm assuming that YOU didn't get 3.3 V (otherwise you wouldn't have started this thread). Well, how can we possibly tell why you are getting the wrong answer when you won't show us how you got the answer you did (or even what the answer was that you got)?correct answer should be 3.3v it is a multiple choice question
Using the approach I outlined earlier: 5v -> 330R -> 330R//330R -> 330R/(330R+330R)*5v.correct answer should be 3.3v it is a multiple choice question
thanks i think this is right way to doUsing the approach I outlined earlier: 5v -> 330R -> 330R//330R -> 330R/(330R+330R)*5v.
So the current is (5v-2.5v)/(330R+330R/2) -> 5ma.
So the answer is 5v-330R*5ma=3.3v.
Is this your homework or the TS?V3, the voltage across R3, is the result of the voltage division by the network R1 in series with the parallel combination of R2 and R3 from the left hand voltage source. And, additionally, the voltage division of the right hand source via R2 in series with parallel combination of R1 and R3. Since R1=R2=R3, I call each R. Due to the symmetry of the circuit the voltage division of the right hand or left hand source produces the same value, so we just double the result from either case to get V3 (principle of superposition).
so setting up the voltage divider times 2....
V3 = 2 * 5V * [ (R||R) / (R + R||R) ]
now divide the numerator and denominator by R to simplify the calculations.
V3 = 10V * [ (1||1) / (1+1||1) ]
plug in the formula for parallel combinations, 1||1 = (1*1) / (1+1).
V3 = 10V * [ (1/2) / ( 1 + 1/2) ]
V3 = 10V * [ (1/2) / (3/2)]
V3 = 10V * [1/3]
V3 = 3.33 V