Discussion :: Circuit Theorems in AC Analysis - General Questions (Q.No.1)
| 1. | Determine VTH when R1 is 180 |
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Answer: Option B Explanation: No answer description available for this question.
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and XL is 90 
63.4° V| Anand M said: (Dec 15, 2011) | |
| I want no the explanation for this quation. | |
| Alfredo said: (Mar 18, 2012) | |
| Why is XL given in ohms? Shouldn't it be henries? | |
| James said: (Apr 24, 2012) | |
| Xl also has some form of resistance | |
| Cherry said: (May 9, 2012) | |
| Simply replace with 180 and 90 and solve 1st find out the current in the loop ...to find Vth 1. 30/sqrtof(180 and 90) with angle ll get 2. then multiply with Xl to get Vth 0.15*90 at angle 90 Ans.13.25 at an angle 63.4 |
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| Gary said: (Aug 16, 2012) | |
| Can't be (A), load voltage is higher than the source. Can't be (C) or (D), as the phase angle is zero. Even without doing the calculations, it has to be (B). |
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| Vijaya said: (Mar 28, 2013) | |
| Give simple technique for this type of problems. | |
| Jai said: (Sep 26, 2013) | |
| voltage across A-B = Voltage across XL = Vth. By volt div. rule, Vth = (30*j90)/(180+j90). = 13.5 ang(63.4). |
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| Nikhil Jain said: (Jun 29, 2014) | |
| The value of inductance should be given in the form of j or in henry. | |
| Nikhil Jain said: (Oct 9, 2014) | |
| Can't be (A) , load voltage is higher than the source. Can't be (C) or (D) , as the phase angle is zero. Even without doing the calculations, it has to be (B). |
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| Vasiq said: (Jan 18, 2015) | |
| @Jai. That is not correct. 90 is the value of the resistor and, hence, shouldn't have a joint in front of it. |
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| Dhananjay said: (Jun 11, 2015) | |
| This can be solved simply. First find total impedance "Z" then current in the branch. Then multiply with the inductor reactance that is X. z = sqrt of (R^2 + X^2) where R = resistance = 180 and X = reactant = 90. Solve it. Find i = supply voltage/impedance (Z) = 30/calculated z. Now to get Vth multiply calculated current with reactance (x=90). Then to find phase angle we know that tan Q = x/r. |
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| Jai said: (Jan 14, 2016) | |
| Explain phase angle? | |
| Ravinder said: (Jul 13, 2016) | |
| By using volt division rule Vab = Vs * XL/ (R1 + XL) which give Vab = 10V. | |
| Bruce said: (Aug 3, 2016) | |
| In a 3 phase cct, 380v, 1 breaker per phase. Q: when all breakers powered, they all trip, why? | |
| Hamimullah said: (Nov 1, 2018) | |
| How to find the phase angle? Anyone explain me. | |
| Riya said: (Apr 28, 2019) | |
| Actually, l is inductance but xl is the impedance of that device. Impedance is simply resistance. Hence it is in ohms. | |
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