The ratio of thermionic currents $(I / I)$ for a metal when the temperature is slowly increased $T_0$ to $T$ as shown in figure. ( $I$ and $I$ are currents at $T$ and respectively). Then which one is correct?
A(a) $A$
B(b) $B \quad T / T_0$
C(c) $C$
D(d) $D$
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A(a) $A$
(a) $i \propto T^2 \Rightarrow \frac{i}{i_0}=\left(\frac{T}{T_0}\right)^2$This is the equation of a parabola.
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