JEE Main 2019 — Current Electricity Question with Solution
From: JEE Main 2019 (Online) 10th January Evening Slot
Question
The actual value of resistance R, shown in the figure is 30. This is measuered in an experiment as shown
using the standard formula R = , where V and I are the readings of the voltmeter and ammeter, respectively. If the measured value of R is 5% less, then the internal resistance of the voltmeter is -
This question includes a diagram. The text above accompanies the figure.
Choose an option
Show full solutionCorrect option: A
Correct answer
A570
Step-by-step explanation
0.95 R =
0.95 30 = 0.05 Rv
Rv = 19 30 = 570
0.95 30 = 0.05 Rv
Rv = 19 30 = 570
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This is a previous-year question from JEE Main 2019, covering the Current Electricity chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.