Electrical Engineering - Energy and Power - Discussion

Discussion :: Energy and Power - General Questions (Q.No.2)

2. 

When the pointer of an analog ohmmeter reads close to zero, the resistor being measured is

[A]. overheated
[B]. shorted
[C]. open
[D]. reversed

Answer: Option B

Explanation:

No answer description available for this question.

Manimaran said: (Jun 1, 2011)  
Ohmmeter working on pass through the current value, so this going to zero value means this resistor shorted.

Kumar said: (Sep 13, 2011)  
If shorted it will show directly zero.

I hope option A is the correct one.

Its conductivity is directly proportional to the rise in temperature. But in this condition the element offers certain resistance. So the meter shows reading near to zero but not zero.

Noonu said: (Nov 1, 2011)  
r=0 when short circuited
r=infinity(high) when open circuited.

Sanoj said: (Mar 3, 2012)  
The ammeter is connected in series so if an ammeter reads zero when there is no current is passing through it that is the ckt is open or disconnected.

Yogesh said: (Apr 2, 2012)  
Ohmmeter measures resistance, so if it measures zero then resistance is zero, which is for a wire.

Ravi Purohit said: (Jun 18, 2012)  
Its option B, because short circuit has zero resistance and open circuit has infinite resistance.

N Kiran said: (Jun 27, 2012)  
A resister does not possible to short circuit so, if meter shows near to zero it is a slight ohmic conductor.

Priya said: (Jul 26, 2012)  
When the circuit is shorted high current flow through the circuit. So the resistance value is zero.

Kirubakaran said: (Sep 9, 2012)  
When a resistor is shorted then the current finds the low resistance path and no current flows through the resistor, that's why ohmmeter reads zero.

Kunle said: (Apr 13, 2013)  
It is overheated when it is NEAR or Approaching Zero while it is shorted when deflection is exactly at zero.

Kiran said: (Apr 18, 2013)  
Resistor does not short circuited when it is individual. It reads zero ohms when it is in circuit if a short in circuit.

Ganesh Teja said: (Jul 25, 2013)  
When high current pass through the ohmmeter its start working and it is shorted then it shows zero.

Ramakanth said: (Feb 12, 2014)  
It is not an ideal resistor so r is approximately equal to zero but not exactly zero when short circuit.

Amit Patel said: (Apr 13, 2014)  
In case of ohmmeter, when the shot circuit condition than current pass maximum value after than circuit burn and current value will be zero this causes indicator is goes from close to zero.

Raju said: (Aug 28, 2014)  
When circuit is said to be short R=0 for ideal, are is small value near to zero in practicals circuit. So that ohmmeter will show near to zero value instead of zero.

Talkmore said: (Jan 8, 2015)  
Guys I'm confused, what is the real answer on that question?

Atul said: (Jan 29, 2015)  
At the time short resistance is very low approximately zero. So answer is correct i.e. B Shorten.

Koushik Mondal said: (Feb 5, 2015)  
The resistance of short circuit is zero. So the correct answer is (B).

Sanjit Keshari said: (May 23, 2015)  
All resistance are zero that is current is no flow through the circuit then circuit is short circuit then answer is B.

Nandeep said: (Nov 6, 2015)  
I think if analog meter directly goes to zero and MCB will break down.

Umapati K said: (Jan 2, 2016)  
Zero resistance: Short circuit.

Infinite resistance: Open circuit.

Mahi said: (Jul 20, 2016)  
Circuit open then R is high.

Circuit close then R is low.

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