Statement I: Potential measured by a voltmeter across a wire is always less than the actual potential difference across it. Statement II: Finite resistance of voltmeter changes current flowing through the resistance across which potential difference is to be measured.

Question

Statement I: Potential measured by a voltmeter across a wire is always less than the actual potential difference across it. Statement II: Finite resistance of voltmeter changes current flowing through the resistance across which potential difference is to be measured. (A) If both statements are true and statement II is the correct explanation of statement I. (B) If both statements are true but statement II is not the correct explanation of statement I. (C) If statement I is true but statement II is false. (D) If both statements are false.

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/26d5921c97814b1cb700c9a74b82f7da-.png" /> i1=(E/R) R eq =(R RV/R+Rν) i2=(E/(R RV / R+RV))

Q. Statement I: Potential measured by a voltmeter across a wire is always less than the actual potential difference across it.
Statement II: Finite resistance of voltmeter changes current flowing through the resistance across which potential difference is to be measured.

If both statements are true and statement II is the correct explanation of statement I.

If both statements are true but statement II is not the correct explanation of statement I.

If statement I is true but statement II is false.

If both statements are false.

$i_{1} = \frac{E}{R} R_{e q} = \frac{R R _{V}}{R + R _{ν}}$
$i_{2} = \frac{E}{( R R _{V} / R + R _{V} )}$

Q. Statement I: Potential measured by a voltmeter across a wire is always less than the actual potential difference across it. Statement II: Finite resistance of voltmeter changes current flowing through the resistance across which potential difference is to be measured.