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Questions  >>  CBSE XII  >>  Physics  >>  Current Electricity
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A heating element using michrome connected to a $230\;V$ supply draws an initial current of $3.2 \;A$ Which settles after a few seconds to a steady value of $2.8 \;A$. What is the steady temperature of the heating element if the room temperature is $27.0^{\circ}$ ? Temperature coefficient of resistance of michrome averaged over the temperature range involved is $1.70 \times 10^{-4 \circ}C^{-1}$

$\begin{array}{1 1} 867.2^{\circ}\;C \\ 1024^{\circ}\;C \\ 127^{\circ}C \\ 27^{\circ}C \end{array} $

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