Request a call back

1)state energy conversion takes place in hydroelectric power plants? 2)an object of mass 1kg is falling from a height of 10 m. Calculate i) the total energy of object at h=10m ii) Potential energy of an object when h=4m   3)Name energy transfers which occurs when a)an electri bell rings b)someone speake into a microphone c)there is a picture on television screen d)A torch is on
Asked by mailtoparvathyprajith | 08 Feb, 2024, 12:32: PM

1) Potential energy of water stored at height -> Kinetic energy of flowing water -> mechanical energy of turbine -> electrical energy

2)  (i) W = m x g x h

When h = 10 m

g = 9.8 m/s2

Potential energy will be  = Work done = m x g x h = 1 x 9.8 x 10 = 98 J ...

(ii) When the object reaches height of 4 m,

The potential energy at 4 m = Work done = m x g x h = 1 x 9.8 x 4 = 39.2 J

3)

(a) electrical energy -> sound energy

(b) Sound energy -> electrical energy

(c) electrical energy -> light energy

(d) electrical energy -> light energy

Answered by Shiwani Sawant | 08 Feb, 2024, 03:12: PM
CBSE 9 - Physics
Asked by mailtoparvathyprajith | 06 Feb, 2024, 09:00: PM
CBSE 9 - Physics
Asked by mattooamit4u | 28 Nov, 2023, 12:36: PM
CBSE 9 - Physics
Asked by topperlearningforcontent | 31 Jan, 2022, 10:14: AM
CBSE 9 - Physics
Asked by tajbindarkaurs | 14 Nov, 2021, 10:19: AM
CBSE 9 - Physics
Asked by kaziryan.05 | 19 May, 2021, 07:43: AM