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 1 of 4.
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.
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.
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)
Priyanshu said:
6 years ago
For voltmeter operation very low current needed, hence it contains internal resistance in series, hence 5 resistors will be added and we will get 100000.
Sagar Kalekar said:
10 years ago
I = 1/(Ifsd).
Ifsd = Full scale deflection i.e. Sensitivity of the meter.
I = 1/20000 = 0.5 x 10^-4.
R = V/I.
R = 5/0.5 x 10^-4.
R = 100, 000 ohm.
Ifsd = Full scale deflection i.e. Sensitivity of the meter.
I = 1/20000 = 0.5 x 10^-4.
R = V/I.
R = 5/0.5 x 10^-4.
R = 100, 000 ohm.
ZERO said:
1 decade ago
Don't tell me that IR is internal resistance? base on the ohms law I= amperes R= resistance, and E= volts. IR=V? in the ohms law pyramid not this IR*V?
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.
Raji said:
1 decade ago
Don't think complicate manner just think about logic its simple the question is per volt it.
Consumes om 20000 there fore 5 volts just multiply it.
Consumes om 20000 there fore 5 volts just multiply it.
Kamal Yadav said:
5 years ago
According to voltmeter sensitivity(ohm/volt),
S=total voltmeter res./ full scale reading=Rm/Vfs.
or, Rm = S*Vfs = 20000*5 = 100,000 ohm.
S=total voltmeter res./ full scale reading=Rm/Vfs.
or, Rm = S*Vfs = 20000*5 = 100,000 ohm.
(1)
Apoorva chourasiya said:
9 years ago
This is sensitivity concept.
Sensitivity = 2000ohm/volt.
Voltage = 5v
So, s = ohm/volt.
Ohm = s * volt.
Ohm = 2000 * 5,
Ohm = 10000ohm.
Sensitivity = 2000ohm/volt.
Voltage = 5v
So, s = ohm/volt.
Ohm = s * volt.
Ohm = 2000 * 5,
Ohm = 10000ohm.
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