when price of foreign currency falls,the demand for that foreign currency rise.explain
Is it a  situation of excess  demand? can we draw that diagram for this situation

there is an inverse relationship between the price and qnty demanded of foreign currency. so as price falls, demand rises. EXAMPLE: suppose price rises from 1$=rs.60 to 1$=rs. 70. due to this, foreign goods become costlier for Indians. as a result imports decrease and the demand for forex also decreases. 
situation of excess demand is NOT created.
diagram can be drawn. draw a downward sloping demand curve and show contraction of demand due to a rise in price