A moving coil instrument gives full scale deflection for a current of 0.01 amperes.Neglecting resistance of the instrument,calculate the approximate value of series resistance needed...

      

A moving coil instrument gives full scale deflection for a current of 0.01 amperes.Neglecting resistance of the instrument,calculate the approximate value of the series resistance needed to enable the instrument to measure up to 20 voltage

  

Answers


Kevin
in series connection we find that ampere is constant hence the resistor to be connected in series with the voltmeter =0.01 amperes.
voltage drop across the resistor =20 volts.
therefore resistance=voltage /current.
R=20/0.01=2000 ohms.
Kevinsenzoochieng answered the question on October 22, 2019 at 19:30


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