Advertisements
Advertisements
प्रश्न
Select the correct alternatives
When a bulb lights up on passing current, the change of energy is
पर्याय
from electrical energy to heat energy
from electrical energy to light energy
from electrical energy to heat and light energy
from electrical energy to mechanical energy.
Advertisements
उत्तर
from electrical energy to heat and light energy
APPEARS IN
संबंधित प्रश्न
A certain household has consumed 250 units of energy during a month. How much energy is this in joules?
Fill in the blank
The ability to do work is called ______
Select the correct alternatives
The correct statement is
What do you mean by conservation of mechanical energy? State the condition when does it hold.
Answer the following in a word or two or in a sentence.
Write the formula for calculating the efficiency of a machine.
Define the term 'watt'.
What is the common name of '1 kWh' of electrical energy?
A cell converts one form of energy into another form. Name the two forms.
A certain household consumes 650 units of electricity in a month. How much is this electricity in joules?
- Take two aluminium channels of different lengths.
- Place the lower ends of the channels on the floor and hold their upper ends at the same height.
- Now take two balls of the same size and weight and release them from the top end of the channels. They will roll down and cover the same distance.
- At the moment of releasing the balls, which energy do the balls have?
- As the balls roll down which energy is converted into which other form of energy?
- Why do the balls cover the same distance on rolling down?
Note: The question is wrong. It should be "Why do the balls cover the same distance after rolling down"? - What is the form of the eventual total energy of the balls?
- Which law related to energy does the above activity demonstrate? Explain.
