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NEET2016PhysicsCurrent ElectricityActual

A galvanometer of resistance 25 shows a deflection of 5 divisions when a current of 2 mA is passed through it. If a shunt of 4 is connected and there are 20 divisions on the scale, then the range of the galvanometer is

Options

  1. A1 A
  2. B58 A
  3. C58 mA
  4. D30 mA

Correct answer

C. 58 mA

Step-by-step solution

There are 20 divisions on scale. Initially, current for 20 divisions = 2 20 5 =8 ~mA array ll & I g=8 ~mA & I g I = S S+G array aligned I & = ( S+G S ) I_g I= ( 4+25 4 ) 8 & =29 2=58 ~mA aligned

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