You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard VII

Physics

Energy Transformation

Consider a ...

Question

Consider a $50 m$ high water fall, with water flowing at a rate of $1.2 \times 10^{6} K g / s$ .Using the power generated in this process,assuming $100 %$ efficiency, the number of $60 W$ bulbs that can be light up is

9.8 \times 10^{6}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

5.88 \times 10^{8}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

9.8 \times 10^{3}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

1000

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $9.8 \times 10^{6}$

Suggest Corrections

Similar questions

In a hydroelectric power plant, waterfalls at a rate of 1000 kg/s from a height of 100 m. Assuming that 50% of the energy of falling water is converted into electrical energy, calculate the power generated per second. $(t a k e g = 9.8 m s^{- 2})$

Q. A person decided to use his bath tub water to generate electric power to run a

40 W

bulb. The bath tub is located at a height of

h

meters from ground and it holds

V

litres of water. He installs a water driven wheel generator on ground. The rate in

m^{3} / s

at which water should drain from bath tub to light the bulb, if efficiency of machine be

90 %

, is (Given density of water

= ρ

and acceleration due to gravity

= g

)

Q. A person decides to use his bath tub water to generate electric power to run a 40 watt bulb. The bath tub is located at a height of 10 m from the ground & it holds 200 litres of water. If we install a water driven wheel generator on the ground, at what rate should the water drain from the bath tub to light bulb? How long can we keep the bulb on, if the bath tub was full initially? The efficiency of generator is 90%. (

g = 10 m / s^{- 2}

)

Q. A continuous flow water heater (geyser) has an electrical power rating

= 2

k W

and efficiency of conversion of electrical power into heat

= 80 %

. If water is flowing through the device at the rate of

100

c c / s e c

, and the inlet temperature is

10^{0}

,then the outlet temperature will be:

Join BYJU'S Learning Program

Consider a 50m high water fall, with water flowing at a rate of 1.2×106Kg/s.Using the power generated in this process,assuming 100% efficiency, the number of 60W bulbs that can be light up is

The correct option is A 9.8×106

Consider a $50 m$ high water fall, with water flowing at a rate of $1.2 \times 10^{6} K g / s$ .Using the power generated in this process,assuming $100 %$ efficiency, the number of $60 W$ bulbs that can be light up is

The correct option is A $9.8 \times 10^{6}$