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AP EAMCET201823 Apr 2018Evening ShiftPhysicsThermal Properties of MatterActual

A wire of 20 is immersed in ice. If 10 ~A current is passed through this wire for 1 minute, ice completely melts. The mass of the ice is nearly (L_ ice =79.7 calg ⁻¹ )

Options

  1. A3.5 g
  2. B359 g
  3. C540 g
  4. D3.5 kg

Correct answer

B. 359 g

Step-by-step solution

aligned Heat gained & = Heat generated mL & =I^2 R t m & = I^2 R t L & = 100 20 60 79.7 4.2 ( 1 cal =4.2 ~J ) & =359 ~g aligned

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