Abscisic acid (ABA), phenolic acid and para-ascorbic acid are inhibitory substances that cause seed dormancy.
Effect of inhibitory substance can be removed by application of certain chemicals like gibberellic acid and nitrates.
AB is a part of an electrical circuit (see figure). The potential difference \(V_A - V_B\), at the instant when current \(i = 2\) A and is increasing at a rate of 1 amp/second is: