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MHT CET202016 Oct 2020Morning ShiftPhysicsCurrent ElectricityActual

An ammeter of resistance 20 gives full scale deflection when 1 ~mA current flows through it. What is the maximum current that can be measured by connecting 4 resistors each of 16 in parallel with the meter?

Options

  1. A6 mA
  2. B8 mA
  3. C4 mA
  4. D2 mA

Correct answer

A. 6 mA

Step-by-step solution

1 S = 4 16 = 1 4 S=4 =20 _ g =1 ~mA =10⁻³ ~A (i-i_ g ) 4=i_ g G=10⁻³ 20=2 10⁻²i-i_ g = 1 2 10⁻²i=0.5 10⁻²+10⁻³=6 10⁻³=6 ~mA

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