Air is completely removed from an electric bulb to create a vacuum or fill it with an inert gas, which prevents the tungsten filament from reacting with oxygen. This helps to prolong the life of the bulb.
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The electrical energy in the tube is almost completely converted into light energy. Fluorescent tubes are preferred over electric bulbs because they are more efficient at converting electrical energy into visible light, reducing energy wastage and providing brighter illumination.
The correct answer is that nichrome wires are used as heating elements due to their high specific resistance and the fact that they do not form oxide when red hot. These properties make nichrome effective at converting electrical energy into ...
Approximately 30-40% of the energy consumed by a tube light is converted into visible light. The rest of the energy is lost as heat due to the inefficiencies in the lighting process.
To stay safe during an uneven lightning strike while in a car, close the windows and remain inside. A car acts as a Faraday cage, distributing the electric charge around its exterior, protecting occupants from lightning. Do not open windows, ...
The charging of objects occurs as a result of the transfer of electrons. Electrons are negatively charged particles that can move from one object to another, leading to the build-up of static electricity. Protons and neutrons, which reside in the ...
When an ebonite rod is rubbed with the skin of a cat, the ebonite rod becomes negatively charged. This happens because the rod gains electrons from the cat’s skin, resulting in an excess of electrons on the rod, which gives ...
Similar charges have repulsion. This is due to the fundamental principle in electrostatics that like charges repel each other. Positive charges repel other positive charges, and negative charges repel other negative charges. This repulsive force can be observed in various ...
If the distance between two electric charges is halved, the value of the electric force between them will become quadruple. This is because the force between two charges increases as the distance between them decreases. Halving the distance results in ...
The force between two electric charges is related to Coulomb’s law. This law describes how the electric force between two charged objects depends on the amount of charge on each object and the distance between them. Coulomb’s law is fundamental ...