Electrical Engineering - Series-Parallel Circuits - Discussion
Discussion Forum : Series-Parallel Circuits - General Questions (Q.No. 1)
1.
The internal resistance of a 20,000 ohm/volt voltmeter set on its 5 V range is
20,000 
100,000
200,000
1,000,000
Discussion:
32 comments Page 3 of 4.
Sunil kumar said:
1 decade ago
For 1 volt internal resistance is 20000 ohms.
For 5 volt internal resistance is ? (X).
V is proportional to R hence 1/5 =20000/X.
Hence X=100000.
For 5 volt internal resistance is ? (X).
V is proportional to R hence 1/5 =20000/X.
Hence X=100000.
Ahmed babu said:
1 decade ago
The voltmeter have an internal resistance of 20,000 ohm/volt.
That is for 1 volt the resistance is 20,000 ohm.
Therefore, for 5 volt the resistance is = 5*20,000 = 1,00,000 ohm.
That is for 1 volt the resistance is 20,000 ohm.
Therefore, for 5 volt the resistance is = 5*20,000 = 1,00,000 ohm.
Jyo said:
1 decade ago
According to ohm's law,
IR = 20,000ohm/volt.
V = 5v.
IR*V = 20,000*5 = 100000.
IR = 20,000ohm/volt.
V = 5v.
IR*V = 20,000*5 = 100000.
Ian Glenn said:
1 decade ago
We can use basic algebra here by ratio and proportion.
20000 ohm/volt means 20000 ohm per unit of volt.
Let x= internal resistance,
20000 ohm/volt=x/5volts.
So x = 20000*5 = 100,000ohm.
20000 ohm/volt means 20000 ohm per unit of volt.
Let x= internal resistance,
20000 ohm/volt=x/5volts.
So x = 20000*5 = 100,000ohm.
Dinesh said:
1 decade ago
IR means Internal Resistance not current and resistance.
Arun Sankar said:
1 decade ago
Ms. Juilee,
I have some doubt,
For finding I means, I=v/R.
But why your using this formula here IR*v.
Can you explain?
I have some doubt,
For finding I means, I=v/R.
But why your using this formula here IR*v.
Can you explain?
Anand said:
1 decade ago
Nice explaination Juilee & Nedunchezlien
Ganeshbabu said:
1 decade ago
Thank you Nedunchezlien.
Harish said:
1 decade ago
Thank you Nadunchezhian.
M.Nedunchezhian said:
1 decade ago
The voltmeter have an internal resistance of 20,000 ohm/volt.
That is for 1 volt the resistance is 20,000 ohm.
Therefore,for 5 volt the resistance is = 5*20,000=1,00,000 ohm.
That is for 1 volt the resistance is 20,000 ohm.
Therefore,for 5 volt the resistance is = 5*20,000=1,00,000 ohm.
(1)
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