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What is the value of current in a series when one resistor is open?
Wiki User
∙ 16y ago
Since it is a series circuit with only one path for current, an open anywhere along that single path will cause current flow to be 0 amps.
Wiki User
∙ 16y ago
Wiki User
∙ 11y agoSome people would say Infinity but that is not generally the case as air has a resistance value which varies dependent on a number of factors. It is in the order of Giga ohms though.
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What are the common defects of a variable resistor?
Normally if a resistor fails they will either increase in value or open up at all (open circuit).
Does an open resistor measure 0 ohms?
No, an open resistor has a value of infinity. An open resistor typically will measure over 900 Megohms. A zero ohm resistor is exactly that, and will measure zero ohms. They are typically surface-mount devices.
How is a resistor different from a fuse?
A resistor is a material that attenuates the current through a conductor. An insulator isolates the conductor from the surrounding material.
What is resistance on something that is shorted?
It depends on weather it is in a parallel or series circuit. In parallel the entire circuit it is in parallel with is shorted out. In series the total resistance decreases by the amount of the resistor that shorted out. Resistors usually open or change value with use.
Will there be a current flow if the resistor burn out which is connected in series?
Depends what you mean when you say "burn out". That's actually a pretty imprecise term.Usually, when we talk about a single passive component "burning out", we mean that some partof it became so hot that the conducting path melted at some point and became "open" at that point.When that happens, the open gap has a very high resistance, and current can't flow across it.So I guess we'd have to say 'no'; when current can't flow through the resistor, then there isno current flow through the resistor.
When the current will be short and open circuited?
Open circuit has no current, so does that mean any resistor in series with it, has no current ,so it can be ignored for analysis( v=ir so 0 current means 0 V) for finding lets say the Thevenin equivalent.? Now for Short circuit, do we ignore a resistor in series with the short, because current will take path of least resistance and ignore that resistor? Also can short circuit have voltage through it ?
What are the common defects of a variable resistor?
Normally if a resistor fails they will either increase in value or open up at all (open circuit).
Does an open resistor measure 0 ohms?
No, an open resistor has a value of infinity. An open resistor typically will measure over 900 Megohms. A zero ohm resistor is exactly that, and will measure zero ohms. They are typically surface-mount devices.
How is a resistor different from a fuse?
A resistor is a material that attenuates the current through a conductor. An insulator isolates the conductor from the surrounding material.
What is resistance on something that is shorted?
It depends on weather it is in a parallel or series circuit. In parallel the entire circuit it is in parallel with is shorted out. In series the total resistance decreases by the amount of the resistor that shorted out. Resistors usually open or change value with use.
Will there be a current flow if the resistor burn out which is connected in series?
Depends what you mean when you say "burn out". That's actually a pretty imprecise term.Usually, when we talk about a single passive component "burning out", we mean that some partof it became so hot that the conducting path melted at some point and became "open" at that point.When that happens, the open gap has a very high resistance, and current can't flow across it.So I guess we'd have to say 'no'; when current can't flow through the resistor, then there isno current flow through the resistor.
Why resistors are connected in series with the voltage source and in parallel with current source?
a voltage source has very less(negligible)resistance.thus is considered as a short.if connected in parallel to a resistor will draw all the current acting as a short.thus is always connected in series of a resistor.where as a current source has tremendous resistance(infinity).thus if connected in series will be conidered as an open branch and no current will flow through it other than the source current.
What happens when resistance is varied in a circuit?
A resistor will not change its value, unless the voltage exceeds the designed power capacity of the resistor. As the voltage increases, the current will increase, if the current gets too high it will cause the temperature of the resistor to increase, if the temperature exceeds the power rating of the resistor then the resistance WILL change. If it goes too High in temperature the resistor will open and current will no longer flow. A resistor is used to control current, and indirectly the .voltage depending on the application. Hope This helps. You must use Ohms Law to see the relationship.
What is a fixed bias circuit?
it is a switching device that need a current..so u will need a resistor to open the switch..
What happens to the value of a resistor when it goes bad?
we can say that a resistor gone bad if 1. its resistance is different than that printed by the color code 2. doesn't conduct any current Resistors normally will burn open. Carbon resistors almost always do this, while wireound resistors can lower in resistance. They may still allow current flow, but it will not be correct.
What is a function of a resistor in a fire alarm circuit?
A resistor in a sensor circuit is used as a simple way to monitor the function of the circuit. The resistor has a calibrated and known voltage drop and current while the circuit is "normal". If there is a short-circuit, or an open-circuit, the voltage and current will change and trigger the trouble alarm.
How to know if the resistor is open and shorted?
I assume that the person asking the question meant "open OR shorted" as these are opposite terms. Most resistors will open when they are damaged. It is very rare to find one that is shorted. To determine if the resistor is open or shorted simply use a multimeter set to measure ohms. Place the leads across the resistor and it should read the resistance value of the resistor. If it measures max range of the meter (some digitals will display "OL") then the resistor is open. If it measures 0 or very close then it is shorted, which as mentioned above, is unlikely.
