Electrical Engineering - Energy and Power - Discussion

Discussion Forum : 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
overheated
shorted
open
reversed
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
22 comments Page 1 of 3.

Manimaran said:   1 decade ago
Ohmmeter working on pass through the current value, so this going to zero value means this resistor shorted.

Kumar said:   1 decade ago
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:   1 decade ago
r=0 when short circuited
r=infinity(high) when open circuited.

Sanoj said:   1 decade ago
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:   1 decade ago
Ohmmeter measures resistance, so if it measures zero then resistance is zero, which is for a wire.

Ravi Purohit said:   1 decade ago
Its option B, because short circuit has zero resistance and open circuit has infinite resistance.

N KIRAN said:   1 decade ago
A resister does not possible to short circuit so, if meter shows near to zero it is a slight ohmic conductor.

Priya said:   1 decade ago
When the circuit is shorted high current flow through the circuit. So the resistance value is zero.

Kirubakaran said:   1 decade ago
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:   1 decade ago
It is overheated when it is NEAR or Approaching Zero while it is shorted when deflection is exactly at zero.


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