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Questions
Name the energy transfers which occur when an electric ball rings.
Name the energy conversion that takes place when an electric bell rings.
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Solution
An electric bell converts electrical energy to sound energy.
RELATED QUESTIONS
Show that the sum of kinetic energy and potential energy (i.e., total mechanical energy) is always conserved in the case of a freely falling body under gravity (with air resistance neglected) from a height h by finding it when
- The body is at the top.
- the body has fallen a distance x.
- the body has reached the ground.
A pendulum is oscillating on either side of its rest position. The correct statement is:
State whether the object possess kinetic energy, potential energy, or both :
A ceiling fan in the off position ______________
State whether the object possess kinetic energy, potential energy, or both :
A stretched spring lying on the ground ____________.
What kind of energy is possessed by the following?
A stretched rubber band _____________
Fill in the blank with suitable word :
The ability of a body to do work is called __________. The ability of a body to do work because of its motion is called __________.
A boy weighing 40 kg makes a high jump of 1.5 m.
What is his kinetic energy at the highest point?
Give two examples where a body possesses both, kinetic energy as well as potential energy.
Name the device which converts electrical energy into mechanical energy.
Name the device or machine which convert :
Chemical energy into heat energy.
Fill in the blank with suitable word:
The electricity meter installed in our homes measure electrical energy in the units of ___________.
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Describe the energy changes which take place in a radio.
Write the energy transformations which take place in an electric bulb (or electric lamp).
A bulb lights up when connected to a battery. State the energy change which takes place :
What do you understand by the term 'transformation of energy"? Explain with an example.
How much electric energy in kWh is consumed by an electrical appliance of 1000 watts when it is switched on for 60 minutes?
How much energy does a 100 W electric bulb transfer in 1 minute?
In the case of negative work, the angle between the force and displacement is
