Discussion :: Parallel Circuits - General Questions (Q.No.5)
|Raji said: (Dec 24, 2010)|
|We know that if voltage increases, current increases & if resistor increase then current decreases.. then in parallel current ckt as increases total resistance also increases...|
|S.Jeyasudha said: (Jun 13, 2011)|
|According to the parallel resistance circuit the equivalent resistance is given by RT=R1||R2= (R1*R2)/(R2+R2. That answer will be less compare with when any one resistance open, because the total resistance is equalto RT=R1 or R2 only. So RT is increases.|
|Aditya said: (Jul 13, 2011)|
|If we consider the two resistance in parallel, r1 &r2, So according law R1*R2/ (R1+R2). If one of them is open means R1=NO, So it will be R2 in Series. So total resistance will decrease.|
|Ankit said: (Aug 1, 2011)|
|As we know for a particular resistor in series net resistance is greater than a resistance in parallel if we remove resistor of one of them from a parallel circuit the net result will increases as reverse as in series.|
|Nandini said: (Oct 30, 2011)|
|Can you give me the proper explanation? I want correct answer.|
|Ragi G R said: (Jan 11, 2012)|
|In parallel resistance the effective resistance value will be less than the smallest valued resistance. For eg, if a 2 ohm and 3 ohm resistance are in parallel effective resistance will be less than 2 ohm. So when one is opened the effective resistance increases.|
|Sreeyush Sudhakaran said: (Feb 19, 2012)|
|Case 1: R1&R2 in parallel
Case 2 : R2 is open circuited
To understand correctly
case 1: R1=1k R2=1k
case 2: R1=1k
So RT increases with removal of R2
|Matthew said: (May 4, 2012)|
|Consider two resistors in parallel. Their total resistance is,
(R1 * R2) / (R1 + R2)
We would like to determine the effect of opening R2. The circuit then contains a single resistor, R1 in series. We would then like to determine whether ? is > or < in the below equation,
(R1 * R2) / (R1 + R2) ? R1
Let's multiply both sides of this inequality by (R1 + R2), which yields,
R1 * R2 ? R1 * (R1 + R2)
expanding the right hand side yields,
R1 * R2 ? R1^2 + R1 * R2
Since resistance is always positive, we have that the right hand side is larger. Therefore, we conclude that resistance will increase.
|Prasanna said: (Aug 19, 2012)|
|Let me explain with the example
R1 = 4 & R2 =4
RT = R1* R2/( R1+R2)
If R1 is open then R1= not available
So RT = R2
That means total resistance increases as one of the resistance is opened.
|Subrata said: (Feb 20, 2013)|
|What will be answered if more than two resistance is connected in a circuit? Like, r1=2, r2=3, r3=4.|
|Sushil said: (May 3, 2013)|
|In series voltage is constant therefore in the circuit only changes current ane of the fact is that resistance decreases then current also increases as per ohms law.|
|Roshan said: (Oct 11, 2013)|
|As circuit is open no current flows & infinite resistance.|
|Bhargavi Veera said: (Nov 30, 2013)|
|Same question in series then then total resistance what happen?|
|Abc said: (Feb 5, 2014)|
|If one of the resistors that are connected in series is opened, then total resistance becomes infinite.|
|Spurthi said: (Oct 4, 2014)|
|If any one of the resistor connected in parallel is open can we take that resistor value as 0?|
|Ravi said: (Dec 19, 2014)|
|Take V = IR relation.
In parallel circuit voltage is constant. So IR must be a constant value if one terminal is open means I = 0. So R became infinity.
|Keerthi Raj said: (Feb 3, 2015)|
|Suppose if you have more than 2 resistors say r1=r2=r3=2 ohm then the equivalent resistance is around 1.3 ohm.
Say r3 is opened then the equivalent resistance is 1 ohm hence from this the resistance is decreased. If we consider only 2 resistors in parallel then the resistance will be increased.
|Azhagusurya said: (Feb 20, 2015)|
|Consider r1 ,r2 are the resistance which are in parallel.
If any one of resistor get open mean the connection became series.
r1 = 2kohm.
r2 = 1kohm.
If both are in parallel means Rt = r1*r2/(r1+r2) = 2/3 = 0.667 kohm.
If both are in series means,
Rt = r1+r2.
Rt = 2+1 = 3kohm.
So resistance value increases when one of them get opened.
|Vicky Meena said: (Mar 10, 2015)|
|How many resistor is there?|
|Vicky said: (Oct 11, 2015)|
|What happens to total resistance in a circuit with parallel resistors if one of them opens?
Anyone explain this question please?
|Mithun said: (Oct 13, 2015)|
|No. The given answer is wrong. It may increase or decrease resistance value depending on the value of resistance.|
|Sooraj said: (Aug 9, 2016)|
|If R1 is in series with parallel connected to R2 and R3, what happens to total current if R2 opens?|
|Shandelin Priyanka said: (Jun 11, 2017)|
|Three identical resistors are connected in series to a battery. If the current of 12 A flows the battery, how much current flows through any one of the resistors?
Can anyone answer this?
|Tushar said: (Jun 15, 2019)|
|If one of the resistors in a parallel circuit, is removed, what happens to the total resistance?|
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