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 ...
Tiwari Academy Discussion Latest Questions
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.
The part of the eye that controls the amount of light entering the eye is the iris. The iris adjusts the size of the pupil, regulating the light that reaches the retina, thereby ensuring optimal lighting conditions for vision in ...
The power of a convex lens with a focal length of 0.2 meters will be +5D. Power (in diopters) of a lens is calculated as the reciprocal of its focal length in meters, so a focal length of 0.2 meters ...
The mirror used for shaving is a plane mirror. It provides a non-inverted virtual image that appears to be the same size as the object, making it suitable for tasks requiring accurate reflection without distortion.
A converging lens is one that collects rays of light. It is thicker at the center than at the edges, causing parallel rays of light passing through it to converge at a focal point beyond the lens, where a real ...
The nature of light radiation is similar to both wave and particle. This dual nature, known as wave-particle duality, is a fundamental concept in quantum mechanics, showing that light exhibits wave-like properties such as interference and diffraction, and particle-like properties ...