Question

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Answer the following question ☺️​

Answer 1

Answer:

1. LED converts heat into light. A light-emitting diode (LED) that emits more light energy than it consumes in electrical energy has been unveiled by researchers in the US. ... It is converted into kinetic energy by means of an electric motor
2. The fan converts a significant portion of the electrical energy into the kinetic energy of the fan blades. At the same time, some electrical energy changes into heat in the fan's motor. If the fan shakes, some of the electrical energy is being turned into unwanted kinetic energy.
3. in dry cell - chemical energy is converted to electrical energy. 2) In electric fan - electrical energy is converted to mechanical energy and wind energy .
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Explanation:

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Answer 2

Answer:

c) Dry cell batteries create electrical energy by converting chemical energy into electricity. The exact means of doing so depends on the type of dry cell battery in question, but the materials that are used are generally zinc and carbon or zinc and manganese dioxide.

These materials are placed within the electrolyte paste within the battery. They react with each other through a chemical process in which the electrolyte (carbon or manganese dioxide) reacts with the zinc, creating electricity. This is transmitted out of the battery using positive and negative electrodes.

b) When energy changes forms, the total amount

of energy is conserved. However, the amount

of useful energy is almost always less than

the total amount of energy. For example,

consider the energy used by an electric fan.

The amount of electrical energy used is

greater than the kinetic energy of the

moving fan blades. Because energy is always

conserved, some of the electrical energy

flowing into the fan’s motor is obviously

changed into unusable or unwanted forms.

The fan converts a significant portion of the electrical

energy into the kinetic energy of the fan blades. At the same

time, some electrical energy changes into heat in the fan’s

motor. If the fan shakes, some of the electrical energy is

being turned into unwanted kinetic energy. The more efficiently the fan uses electrical energy, though, the more energy

will be transformed into kinetic energy that moves the air.

a) LED converts heat into light. A light-emitting diode (LED) that emits more light energy