Electronics and Communication Engineering - Measurements and Instrumentation - Discussion

Discussion Forum : Measurements and Instrumentation - Section 4 (Q.No. 13)
13.
What would be the reading of voltmeter as shown in below figure. The voltmeter has a 0-1 V scale and is a 20000 Ω/V meter
0.4545 V
0.082 V
0.82 V
4.54 V
Answer: Option
Explanation:

Effective resistance of circuit

.

Discussion:
6 comments Page 1 of 1.

Shivam raj said:   5 years ago
Very simple.

100//20=16.67.
Now. 5*16.67/(1000+16.67).=0.082.
All in kohm.

Bifrost said:   6 years ago
@Kishan Beldiya.

Do not overcomplicate things. The 1M is in series with the parallel combination of 100K and 20K (internal voltmeter resistance). That gives the total resistance of the circuit. From there, it's a simple voltage divider:

5V*((100K||20K)/1M+(100K||20K)) = 0.082V.
(1)

Kishan Beldiya said:   6 years ago
Apply node analysis:

Assume x is node,
x-5/1000k = x/100k + x/20k,
x = -0.082.

Deep said:   8 years ago
Please expain it.

Valerian said:   9 years ago
I think the answer is 4.54v.

Sreehari said:   9 years ago
From where this 16.6667 come? Explain clearly.

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