Electronic Circuit Question.

Thread Starter

RRITESH KAKKAR

Joined Jun 29, 2010
2,829
In a 20 Vac series RC circuit, if 20 V is measured across the resistor and 40 V is measured across the capacitor, the applied voltage is:
 

Thread Starter

RRITESH KAKKAR

Joined Jun 29, 2010
2,829
What is the angle theta value for a 5.6
F capacitor and a 50-ohm resistor in series with a 1.1 kHz, 5 Vac source?


After solving:
P Active power across R=0.5W
Q Reactive C= 0.967VAR
So, S=√(P²+Q²)
S=1.10VA

cosΦ=Base /hyp.
cosΦ=0.5/1.10=62.9

But answer is –27.3 degrees
 

shteii01

Joined Feb 19, 2010
4,644
What is the phase shift between the voltage across the resistor and the voltage from the source?


Convert C1 into impedance.
Now you have two "resistors" in series, also known as Voltage Divider.
Apply voltage divider formula to R1 to find voltage across R1 in complex form.
Extract the angle from the complex voltage of R1.
 

WBahn

Joined Mar 31, 2012
25,907
RRITESH,

PLEASE, one problem at a time (in a given thread). You posted several problems and have created utter chaos because no one can keep track of which problem a given response is for.

Start ONE thread on ONE problem, provide YOUR best attempt to solve that ONE problem, and focus on that ONE problem until you understand the solution.
 

WBahn

Joined Mar 31, 2012
25,907
how to know or calculate this.
Which component is shorted?
This makes no sense at all. Leaving aside the fact that your ammeters are should 2.4 GA (i.e., 2,400,000,000 amperes), the fact that they are all the same means NO current is flowing downward through ANY of the resistors that are connected between meters. Hence R1, R2, and R2 are ALL acting like open circuits. Then assuming that your 2.400G should be 2.400m, R4 is behaving like a 5 kΩ resistor.
 
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