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JEE Main 2022 (29 Jun, Shift 2) · Kirchhoff's Laws & Measuring Instruments

Kirchhoff's Laws & Measuring Instruments question from JEE Main 2022 (29 Jun, Shift 2)

Q112JEE Main 2022 · 29 JUN · SHIFT 2Medium

Kirchhoff's Laws & Measuring Instruments

Two resistors are connected in series across a battery as shown in figure. If a voltmeter of resistance 2000 $\Omega$ is used to measure the potential difference across 500 $\Omega$ resistor, the reading of the voltmeter will be ___________ V.

Numerical answer type. Work it out, then open the answer.

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Answer: 8

$500\ \Omega \| 2000\ \Omega = \dfrac{500 \times 2000}{2500} = 400\ \Omega$
Total $R = 400 + 600 = 1000\ \Omega$ , $I = \dfrac{20}{1000} = 0.02\text{ A}$ .
Reading $= 0.02 \times 400 = 8\text{ V}$

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