چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب موٹا ہو جاے گا
Electric power is the rate at which electrical energy is transferred by an electric circuit.
The SI unit of power is the watt, one joule per second.
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ND17-1-2023
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The smell of the photocopies machines is due to the presence of----?
Ozone, a form of oxygen, is a normal constituent of the earth's atmosphere.
Photocopiers create ozone through their "corona wires" that apply a charge to the paper so the ink will cling to it
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ND17-1-2023
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The release of energy from the sun is the result of
Solar energy is created by nuclear fusion that takes place in the sun.
Fusion occurs when protons of hydrogen atoms violently collide in the sun's core and fuse to create a helium atom.
This process, known as a PP (proton-proton) chain reaction
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ND17-1-2023
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The index of refraction depends on ---------
The refractive index of a medium is dependent (to some extent) upon the frequency of light passing through, with the highest frequencies having the highest values of n.
For example
in ordinary glass, the refractive index for violet light is about one percent greater than that for red light.
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The Refractive Index of a medium depends upon the refractive index of the surroundings, optical density, wavelength of the light, and temperature.
ND17-1-2023
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Cell wall of fungi is made up of:
The cell wall is a characteristic structure of fungi and is composed mainly of:
glucans, chitin, and glycoproteins
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ND17-1-2023
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Which gas is used to destroy the harmful bacteria in the water?
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ND17-1-2023
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A conjugate acid is a specific form by accepting a?
A conjugate acid, within the Brønsted–Lowry acid-base theory,
is a chemical compound formed when an acid donates a proton (H+) to a base
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ND17-1-2023
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Transformer work on-------------supply
The transformer work only on an AC supply
because A transformer needs an alternating current that will create a changing magnetic field
note:
The transformer does not work on DC.
Direct current doesn't have a variable magnetic field
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ND17-1-2023
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Formation of heat in a chemical reaction is called?
An exothermic reaction is a chemical reaction that releases energy in the form of light or heat
it is the opposite of an endothermic reaction
expressed in a chemical equation:
reactants --> protect + energy
exothermic reaction "Exo" means the release and "thermic" means heat
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ND17-1-2023
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The characteristics of reversible reaction is
A reversible reaction can never proceed to completion.
This is because a reversible reaction is an equilibrium reaction in which both forward and reverse reactions occur at the same rate.
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ND17-1-2023
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