Electronics - Parallel Circuits - Discussion
Discussion Forum : Parallel Circuits - General Questions (Q.No. 25)
25.
Which component is open?
Discussion:
17 comments Page 2 of 2.
Kishu said:
1 decade ago
Answer R1 is open because current not flow in R1 because there is short circuit across R1 current always flow in low resistive path.
Sreeyush Sudhakaran said:
1 decade ago
It=I1=0.021A
I3=0.003A
IR1=12/1K=0.012A
IR2=12/2K=0.006A
IR3=12/3K=0.004A
IR4=12/4K=0.003A
here we can see that IR4=I3 (0.003A) ie no current is flowing through R3
Also It=IR1+R2+IR3+IR4=0.012+0.006+0.004+0.003=0.025 Which is
not correct.
By open circuiting R3 we get It=0.012+0.006+0.003=0.021 which is correct.
So R1 is open in the circuit
I3=0.003A
IR1=12/1K=0.012A
IR2=12/2K=0.006A
IR3=12/3K=0.004A
IR4=12/4K=0.003A
here we can see that IR4=I3 (0.003A) ie no current is flowing through R3
Also It=IR1+R2+IR3+IR4=0.012+0.006+0.004+0.003=0.025 Which is
not correct.
By open circuiting R3 we get It=0.012+0.006+0.003=0.021 which is correct.
So R1 is open in the circuit
Hanish said:
1 decade ago
Super deepi.
Gopiram Verma said:
1 decade ago
Good explanation deepti.
Deepti said:
1 decade ago
Total current = 21mA
Current through R1 & R2 = 18mA
So it needs R1 & r2 equivalent = 2/3 which is true.
So R1 R2 not open
Now total voltage acrros last branch = 12v
which is given by R4 ( 4Kohm * 3mA)so there is no need of R3
Hence it is opened.
Current through R1 & R2 = 18mA
So it needs R1 & r2 equivalent = 2/3 which is true.
So R1 R2 not open
Now total voltage acrros last branch = 12v
which is given by R4 ( 4Kohm * 3mA)so there is no need of R3
Hence it is opened.
Krishnan said:
1 decade ago
I don't understand its meaning.
Sasi said:
1 decade ago
If R3 get open means R4 also opened.
So, we can get a maximum output.
So, we can get a maximum output.
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