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The Net Resistance of an Ammeter Should Be Small to Ensure that - Physics

MCQ
Fill in the Blanks

The net resistance of an ammeter should be small to ensure that _______________ .

Options

  • it does not get overheated

  • it does not draw excessive current

  • it can measure large currents

  • it does not appreciably change the current to be measured

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Solution

it does not appreciably change the current to be measured

 

The ammeter is connected in series with the circuit to measure the net amount of current flowing through the circuit. If the net resistance of the ammeter is high, then the amount of current that the circuit draws will have error. Hence, we cannot accurately measure the amount of current that the circuit draws from the voltage source. Hence, the net resistance or the equivalent resistance of an ammeter should be small enough to ensure that it does not appreciably change the current to be measured.

Concept: Potentiometer
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APPEARS IN

HC Verma Class 11, Class 12 Concepts of Physics Vol. 2
Chapter 10 Electric Current in Conductors
MCQ | Q 14 | Page 197
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