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MHT CET202312 May 2023Morning ShiftPhysicsCurrent ElectricityActual

Resistance of a potentiometer wire is 2 / m . A cell of e.m.f. 1.5 ~V balances at 300 ~cm . The current through the wire is

Options

  1. A2.5 ~mA
  2. B7.5 ~mA
  3. C250 ~mA
  4. D750 ~mA

Correct answer

C. 250 ~mA

Step-by-step solution

l=300 ~cm =3 ~m Total resistance of wire, R =3 2=6 Since, the potentiometer is balanced. Voltage across wire segment =1.5 ~V array ll & IR =1.5 ~V & I = 1.5 6 =250 ~mA array

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