Water falls from a height of 60 , m at the rate of 15 kg/s to ope… - Vidyadip

MCQ

Water falls from a height of $60\, m$ at the rate of $15 kg/s$ to operate a turbine. The losses due to frictional forces are $10\%$ of energy. How much power is generated by the turbine ............. $\mathrm{kW}$ ? $\, (g = 10 \,m/s^2)$

A
$12.3$
B
$7$
✓
$8.1$
D
$10.2 $

✓

Answer

Correct option: C.

$8.1$

c
Mass of water falling/second $-15\ kg/s$

$h=60\ m,\ \ g=10\ m/s^2$, loss$\, =10\%$ i.e., $90\%$ is used.

Power generated $=15\times 10\times 60\times 0.9=8100\ W=8.1\ kW$

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