A voltmeter has a range 0-V with a series resistance R. With a series resistance 2 R, the range is 0-V'. The correct relation between V and V' is

Question

A voltmeter has a range 0-V with a series resistance R. With a series resistance 2 R, the range is 0-V'. The correct relation between V and V' is (A) V' < 2V (B) V' > > 2V (C) V'=2V (D) V' > 2V

Tardigrade Admin · Accepted Answer

Using V = Ig (G + R) we get V' = Ig (G + 2R) and 2V = Ig (2G + 2R) ∴ V' < 2V

Q. A voltmeter has a range 0-V with a series resistance R. With a series resistance 2 R, the range is 0-V'. The correct relation between V and V' is

V' < 2V

V' > > 2V

V'=2V

V' > 2V

Using V = $I_{g}$ (G + R) we get V' = $I_{g}$ (G + 2R) and 2V = $I_{g}$ (2G + 2R) $∴$ V' < 2V

Q. A voltmeter has a range 0-V with a series resistance R. With a series resistance 2 R, the range is 0-V'. The correct relation between V and V' is

V' < 2V

V' > > 2V

V'=2V

V' > 2V

Using V = Ig​ (G + R) we get V' = Ig​ (G + 2R) and 2V = Ig​ (2G + 2R) ∴ V' < 2V

Using V = $I_{g}$ (G + R) we get V' = $I_{g}$ (G + 2R) and 2V = $I_{g}$ (2G + 2R) $∴$ V' < 2V