Electronics - Parallel Circuits - Discussion
Discussion Forum : Parallel Circuits - General Questions (Q.No. 20)
20.
What are the individual values of two parallel resistors whose RT is 8 ohms, when one has double the resistance of the other?
Discussion:
15 comments Page 1 of 2.
Jessi said:
1 decade ago
Effective Resistance=8
therefore R1||R2=12||24=8ohms
so D is the right option
therefore R1||R2=12||24=8ohms
so D is the right option
Karthik said:
1 decade ago
I am Not agree that
Correct answer is
if R1,R2-16Ohms so that only RT =8Ohms
So Given option is wrong
Pls clarify...
Correct answer is
if R1,R2-16Ohms so that only RT =8Ohms
So Given option is wrong
Pls clarify...
Mamatha said:
1 decade ago
Let R1 be x, so R2 is 2x
8=(x*2x)/(x+2x)
So x is 12
Hence R1 is 12 and R2 is 24
8=(x*2x)/(x+2x)
So x is 12
Hence R1 is 12 and R2 is 24
Niki said:
1 decade ago
I agree with mamatha
Chinnu said:
1 decade ago
Gn:Rt=8
also r1||r2;nd r1=2r2 =>r1/2=r2
=>(r1*r1/2)/(r1+r1/2)=8
=>r1=24
r2=r1/2 =>r2=12
also r1||r2;nd r1=2r2 =>r1/2=r2
=>(r1*r1/2)/(r1+r1/2)=8
=>r1=24
r2=r1/2 =>r2=12
Birundha said:
1 decade ago
R1+R2/R1R2=8
heraR1=2R2
3R2/2R2^2=8
1.5/R2=8
8R2=1.5
R2=1.5/8
R2=.18
R1=.375
please check in this type and tell clear ans for me.
heraR1=2R2
3R2/2R2^2=8
1.5/R2=8
8R2=1.5
R2=1.5/8
R2=.18
R1=.375
please check in this type and tell clear ans for me.
Sreeyush Sudhakaran said:
1 decade ago
RT=R1R2/R1+R2
Given RT=8 Ohms Let R1=R then R2 = 2R
8= RX2R/R+2R
8 = 2R^2/3R
8 = (2/3)XR
R = 24/2 =12 Ohms R1=12 ohms and R2=2R=2x12= 24 Ohms
Given RT=8 Ohms Let R1=R then R2 = 2R
8= RX2R/R+2R
8 = 2R^2/3R
8 = (2/3)XR
R = 24/2 =12 Ohms R1=12 ohms and R2=2R=2x12= 24 Ohms
Prasanna said:
1 decade ago
@Burunda you are wrong.
1/Rt = 1/R1 + 1/R2.
But you have written Rt = 1/R1+1/R2 which is giving you wrong answer.
1/Rt = 1/R1 + 1/R2.
But you have written Rt = 1/R1+1/R2 which is giving you wrong answer.
Alisha said:
1 decade ago
What is the meaning of this sign ^ ?
Ram said:
1 decade ago
^ means power.
x^2 means X to the power of 2.
x^2 means X to the power of 2.
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