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Gaurav Mandal 5 years, 6 months ago
Yogita Ingle 5 years, 6 months ago
Electroplating is basically the process of plating a metal onto the other by hydrolysis mostly to prevent corrosion of metal or for decorative purposes. The process uses an electric current to reduce dissolved metal cations to develop a lean coherent metal coating on the electrode. Electroplating is often applied in the electrical oxidation of anions on a solid substrate like the formation of silver chloride on silver wire to form silver chloride electrodes.
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Aashish Srivastava 5 years, 6 months ago
Shivani Arora 5 years, 6 months ago
Posted by Naitik Chaudhary 5 years, 6 months ago
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Yogita Ingle 5 years, 6 months ago
The formation of clouds involves friction between water droplets in the atmosphere. The friction charges the particles in the atmosphere. By a process, not yet completely understood, among the positive and negative charges, the negative charges accumulate at the bottom of the cloud and the positive charges at the top. As the accumulation of the charges increases, the cloud will induce positive charges on the ground nearby. As the amount of charge increases, the negative charges on the cloud tend to make a path towards the ground, and it results in a narrow streak of electrical discharge, which we call lightning.
Posted by Kuahagra Patni 5 years, 6 months ago
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Meghna Thapar 5 years, 6 months ago
When methane, CH4, combines with oxygen, O2, in the air and burns, carbon dioxide, CO2, and water, H2O, are produced.
Posted by Kuahagra Patni 5 years, 6 months ago
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Meghna Thapar 5 years, 6 months ago
When methane, CH4, combines with oxygen, O2, in the air and burns, carbon dioxide, CO2, and water, H2O, are produced.
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Twinkle Preet 5 years, 6 months ago
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Preksha Yadav 5 years, 6 months ago
Yogita Ingle 5 years, 6 months ago
- Charging by rubbing: Charging of an object by rubbing it with another object is called charging by rubbing.The body which loses electrons acquires positive charge whereas the body which gains electrons acquires negative charge.
- Charging by conduction: Charging a neutral body by bringing it in contact with a charged body is called charging by conduction.
- Charging by induction: Charging a neutral body by bringing it near a charged body is called charging by induction
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Somya Agrawal 5 years, 6 months ago
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Dhruthi Dhruthi 5 years, 6 months ago
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Iccha Agarwal 5 years, 6 months ago
Yogita Ingle 5 years, 6 months ago
Regular Reflection: When light falls on a smooth uniform surface (like a mirror), all the parallel incident rays are reflected perfectly parallel. This is called Regular Reflection.
Posted by Navi Rasul 5 years, 6 months ago
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Yogita Ingle 5 years, 6 months ago
High initial price: LEDs are currently more expensive (price per lumen) on an initial capital cost basis, than most conventional lighting technologies.
Temperature dependence: LED performance largely depends on the ambient temperature of the operating environment – or "thermal management" properties. Over-driving an LED in high ambient temperatures may result in overheating the LED package, eventually leading to device failure. An adequate heat sink is needed to maintain long life. This is especially important in automotive, medical, and military uses where devices must operate over a wide range of temperatures, which require low failure rates. Toshiba has produced LEDs with an operating temperature range of -40 to 100 °C, which suits the LEDs for both indoor and outdoor use in applications such as lamps, ceiling lighting, street lights, and floodlights.
Voltage sensitivity: LEDs must be supplied with the voltage above the threshold and a current below the rating. Current and lifetime change greatly with a small change in applied voltage. They thus require a current-regulated supply (usually just a series resistor for indicator LEDs).
Light quality: Most cool-white LEDs have spectra that differ significantly from a black body radiator like the sun or an incandescent light. The spike at 460 nm and dip at 500 nm can cause the color of objects to be perceived differently under cool-white LED illumination than sunlight or incandescent sources, due to metamerism, red surfaces being rendered particularly badly by typical phosphor-based cool-white LEDs. However, the color-rendering properties of common fluorescent lamps are often inferior to what is now available in state-of-art white LEDs.
Posted by Nisha Bajaj 5 years, 6 months ago
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Gaurav Seth 5 years, 6 months ago
Pollutants that deplete the ozone layer are chlorofluorocarbons (CFC), nitrogen oxides and hydrocarbons. CFC is used in air conditioners and refrigeration, as cleaning solvents, aerosol propellants, in foam insulation and in certain fire extinquishers. These pollutants react with ozone molecules and disintegrate them.
Nisha Bajaj 5 years, 6 months ago
Posted by Sheenam Bansal 5 years, 6 months ago
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Yogita Ingle 5 years, 6 months ago
The point where energy is released is called the focus or hypocentre. It is generally located at the depth of 60 km.
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Posted by Lakshay Sharma 5 years, 6 months ago
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Preksha Yadav 5 years, 6 months ago
Yogita Ingle 5 years, 6 months ago
Electroscope : A device which can detect static electric charges is called electroscope.
Uses of electroscope :
(i) It detects the static electric charges.
(ii) It can find the nature of electric charges.
(iii) It can compare the magnitude of charges on two different bodies.
Posted by Mayank Moyal 5 years, 6 months ago
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Preksha Yadav 5 years, 6 months ago
Yogita Ingle 5 years, 6 months ago
While constructing dams the base is made more wider because a lot of water inside the dam increases the pressure on the ground and if the base will be little bit thinner than the dam can be broken or damaged and may result to a massive flood therefore the dam's bases made wilder.
Posted by Arti Minz 5 years, 6 months ago
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Yogita Ingle 5 years, 6 months ago
Symbiosis is the phenomenon by which two organisms maintain relationship with each other to be mutually benefitted. In symbiotic mode, organisms develop a special relationship with certain other organisms to obtain nourishment. Organisms involved in this type of relationship are called as symbionts.
e.g. Rhizobium bacteria and Leguminous plants are symbionts exhibiting symbiosis.
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