Electrical Engineering - Circuit Theorems in AC Analysis - Discussion
Discussion Forum : Circuit Theorems in AC Analysis - General Questions (Q.No. 1)
1.
Determine VTH when R1 is 180 
and XL is 90 .
and XL is 90 .
135
63.4° V
63.4° V13.563.4° V
63.4° V12.20° V
0° V1220° V
0° VDiscussion:
16 comments Page 1 of 2.
Anand m said:
1 decade ago
I want no the explanation for this quation.
Alfredo said:
1 decade ago
Why is XL given in ohms? Shouldn't it be henries?
James said:
1 decade ago
Xl also has some form of resistance
Cherry said:
1 decade ago
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
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
Gary said:
1 decade ago
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).
Can't be (C) or (D), as the phase angle is zero.
Even without doing the calculations, it has to be (B).
Vijaya said:
1 decade ago
Give simple technique for this type of problems.
Jai said:
1 decade ago
voltage across A-B = Voltage across XL = Vth.
By volt div. rule,
Vth = (30*j90)/(180+j90).
= 13.5 ang(63.4).
By volt div. rule,
Vth = (30*j90)/(180+j90).
= 13.5 ang(63.4).
(5)
Nikhil jain said:
1 decade ago
The value of inductance should be given in the form of j or in henry.
Nikhil Jain said:
1 decade ago
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).
Can't be (C) or (D) , as the phase angle is zero.
Even without doing the calculations, it has to be (B).
(1)
Vasiq said:
1 decade ago
@Jai.
That is not correct. 90 is the value of the resistor and, hence, shouldn't have a joint in front of it.
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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