32. The slope of the tangent to the curve x = t2 +3t - 8, y = 2t2 – 2t - 5 at the point (2, - 1) is
phet balancing lengths of potentio meter wire are 800 cm and 600cm when two cells of emf E and E, are connected in the secondary circuit first in series and then terminals of one cell is reversed: is equal to