If a 100-watt electric bulb burns for 10 hours, it consumes 1 kilowatt hour (kWh) of electricity. Since electricity is sold at the rate of Rs 5 per unit, the cost of running the bulb for 10 hours will be ...
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The law stating that the potential difference applied at the ends of a conductor is directly proportional to the current flowing through it, given no change in the physical condition of the conductor, is Ohm’s law. This law defines the ...
The filament of an electric bulb is made of tungsten. Tungsten is chosen for its high melting point and ability to withstand intense heat without melting, making it ideal for producing light when an electric current passes through it.
The SI unit of specific resistance, also known as resistivity, is the ohm-meter (symbol: Ω·m). Resistivity quantifies the intrinsic resistance of a material to the flow of electric current. It is a characteristic property that depends on the material’s composition ...
The way to separate colors is by using a prism. When white light passes through a prism, it refracts differently based on wavelength, causing it to separate into its constituent colors—red, orange, yellow, green, blue, indigo, and violet—forming a spectrum.