Equivalent resistance between $A$ and $B$ is ............ $\Omega$
A$4$
B$8$
C$2$
D$1$
Medium
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B$8$
b
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A heating element has a resistance of $100\,\Omega $ at room temperature. When it is connected to a supply of $220\,V,$ a steady current of $2\,A$ passes in it and temperature is $500\,^oC$ more than room temperature. What is the temperature coefficient resistance of the heating element?
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