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MHT CET202019 Oct 2020Evening ShiftPhysicsCurrent ElectricityActual

A 10 ~m long wire of resistance 20 is connected in series with a battery of e.m.f. 3 volt and a resistance of 10 . The potential gradient along the wire in volt/meter is

Options

  1. A0 02
  2. B1 2
  3. C0 10
  4. D0 20

Correct answer

D. 0 20

Step-by-step solution

(B) Total resistance R =20+10=30 current I = E R = 3 30 =0.1 ~A p.d. acros wire V=I R_ w =0.1 20=2 ~V aligned Potential gradient &= V L &= 2 10 =0.2 ~V / m aligned

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