Let us take a resistor and apply a potential difference V cross it, then the current passing through it will be proportional to V; i.e. V ∝ I or V = IR, where R is the constant of proportionality. Thus we can say that current varies linearly with V i.e. V – I graph is a straight line with the slope equal to tan θ = R = .But there exists certain semiconductor in nature like triode in which the relation between V & I is non-linear and is given by I = k ; where Vg & Vp are electric potential & I is current. Then the dimensions of k are given by MaLbTCAd,

(i) What is the value of a –