Questions
A voltmeter has a range with a series resistance R. With a series resistance 2R, the range is The correct relation between V and V' is
a
V'=2V
b
V'>2V
c
V'>>2V
d
V'<2V
detailed solution
Correct option is D
For conversion of galvanometer (of resistances) into voltmeter, a resistance is connected in series.∴ ig =VR+G and ig =V'2R+G⇒ VR+G = V'2R+G⇒ V'V=2R+GR+G = 2R+G−GR+G=2−GR+G ⇒ V'=2V−VGR+G ⇒ V'<2VTalk to our academic expert!
Similar Questions
In the given circuit, the voltmeter records 5 volt. The resistance of the voltmeter in ohms is
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