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Current Electricity question

2016 · 10 Apr · Shift 1 · Q57
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Current Electricity question

2016 · 10 Apr · Shift 1 · Q57

JEE MainPhysicsCurrent ElectricityMCQ+4 / −1
The resistance of an electrical toaster has a temperature dependence given by R(T) = R0 [1 + α\alphaα(T − T0)] in its range of operation. At T0 = 300 K, R = 100 Ω\OmegaΩ and at T = 500 K, R = 120 Ω\OmegaΩ. The toaster is connected to a voltage source at 200 V and its temperature is raised at a constant rate from 300 to 500 K in 30 s. The total work done in raising the temperature is :
  1. A
    400 ln⁡ 1.51.3 J\ln \,{{1.5} \over {1.3}}\,Jln1.31.5​J
  2. B
    200 ln⁡ 23 J\ln \,{{2} \over {3}}\,Jln32​J
  3. C
    60000 ln⁡ 65 J\ln \,{{6} \over {5}}\,Jln56​J
  4. D
    300 J
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