Question

A voltmeter of resistance 500 ohm is used toमेजर द इमेज ऑफ सेल ऑफ इंटरनल रेजिस्टेंस फ्रॉम व्हाट विल बी द परसेंटेज एरर इन रीडिंग ऑफ द वर्ल्ड मीटर

Answer 1

Hey mate, here is your answer :

500 ohms is a very low resistance for a voltimeter, it will take 10 mA (from tested point) at full scale but if that is the case you should a resistor of 9.5 Kohms inside one of the tester probes, with 10 mA 95 volts will drop inside the probe dissipating almost one watt (the resistor should be able to dissipate that) then the reading of 5 Volts implies that the test point have 100 Volts when being tested (its voltage when not being tested will depend on circuit Thevenin internal resistance and could be twice the read value if that resistance is as high as 10 ohms).

Hope this answer helps you...