How does the fan work when i switch it on
Is solar cell forward biased?
Write the energy transformation that takes place in the following:
State energy conversion that takes place during working of Microphone.
What are the properties of solar cells?
How many joules are there in kilowatt hour?
Give one example where heat energy can be converted to other forms of energy.
Energy is the ability of doing work.
When you compress a coil spring you do work on it. The elastic potential energy
- 19.6 N
- 19.6 J
- 19.6 kg
- 19.6 m
An iron block of mass falls from a height of after colliding with the ground it loses of energy to the surrounding then find the temperature rise of the block(take specific heat of )
An aeroplane flying high in the sky possesses :
both (A) and (B)
None of the above
What happens If we heat iron rod? Is it observable or not
Please explain in detail the motion in Roller Coaster Ride.
Hydro energy is an indirect source of solar energy. Justify this statement.
In a solar cell, light energy is converted to what?
Name the energy changes taking place when the following devices are used: Bunsen burner.
How is solar energy directly converted into electrical energy?
Define the term ‘energy’. write the names of different forms of energy.
A body is kept in rest at some height and its kinetic energy is zero.
The energy used by a horse to pull cart is called
Define the term calorie. How is it related to joule?
The amount of energy required to raise the temperature of 1 gram of water by 1 degree celsius, 1 cal = 4.18 J
The amount of energy required to raise the temperature of 1 gram of water by 1 kelvin, 4.18 Cal = 1 J
The amount of energy required to raise the temperature of 1 gram of water by 1 Fahrenheit, 4.18 Cal = 1 J
The amount of energy required to raise the temperature of 1 gram of ether by 1 degree celsius, 1 cal = 4.18 J
State the energy change in the case of ceiling fans.
- K.E. only
- neither K.E. nor P.E.
- both P.E. and K.E.
- P.E. only
A machine does a work of in and . Calculate the power of the machine in .
A machine does a work of in . What is the power of the machine?