Electronics - Parallel Circuits - Discussion
Discussion Forum : Parallel Circuits - General Questions (Q.No. 5)
5.
What happens to total resistance in a circuit with parallel resistors if one of them opens?
Discussion:
25 comments Page 2 of 3.
Sushil said:
1 decade ago
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:
1 decade ago
As circuit is open no current flows & infinite resistance.
BHARGAVI VEERA said:
1 decade ago
Same question in series then then total resistance what happen?
Abc said:
1 decade ago
If one of the resistors that are connected in series is opened, then total resistance becomes infinite.
Spurthi said:
1 decade ago
If any one of the resistor connected in parallel is open can we take that resistor value as 0?
Ravi said:
1 decade ago
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.
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:
1 decade ago
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.
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:
1 decade ago
Consider r1 ,r2 are the resistance which are in parallel.
If any one of resistor get open mean the connection became series.
Ex:
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.
If any one of resistor get open mean the connection became series.
Ex:
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:
1 decade ago
How many resistor is there?
Vicky said:
10 years ago
What happens to total resistance in a circuit with parallel resistors if one of them opens?
Anyone explain this question please?
Anyone explain this question please?
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers