For a Pelton wheel with a given water jet velocity, the

For a Pelton wheel with a given water jet velocity, the maximum output power from the Pelton wheel is obtained when the ratio of the bucket speed to the water jet speed is ______ (correct to two decimal places).

In pelton wheel:-

η=	2(vu -u²)
	v²

where,
u = bucket speed
v = water jet speed
So, For maximum efficiency:-

	dx	= 0
	du

2(v – 2u) = 0 v = 2u

u =	v
	2