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To measure p.d between two points in a c...

To measure p.d between two points in a circuit, minimum current should pass through the voltmeter. Why?

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Otherwise the expected potential drop (as current x resistance) may not be produced.
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NEW JOYTHI PUBLICATION-MOVING CHARGES AND MAGNETISM-EVALUATION QUESTIONS AND ANSWERS
  1. How can you measure a high current using a galvanometer?

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  2. How will you connect a voltmeter in a circuit?

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  3. To measure p.d between two points in a circuit, minimum current should...

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  4. How can you convert a galvanometer into an voltmeter? Can you use Volt...

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  5. What is the magnetic field at a point on the axial line on a current c...

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  6. How can you rewrite the above equation in terms of area of the loop?

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