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ENERGY LEVELS
The energy levels, measured in electron volts (e.v.) in which orbiting electrons exist comply with a law of physics which states that energy can be given to electrons only in discrete amounts (quanta) which means that there are energy values that an electron cannot acquire. From this it can be deducted that there is a forbidden energy gap between each of the allowed energy bands K to O.
The width of the forbidden energy gap between the top of the valence band and the bottom of the conduction band determine the electrical conducting properties of materials.
A single-phase transformer has 2000 turns on the primary and 800 turns on the secondary. Its no-load current is 5A at a power factor of 0.20 lagging. Assuming the volt drop
As a 10 kilogram mass on the end of a spring passes through its equilibrium position, the kinetic energy of the mass is 20 joules. The speed of the mass is: a) 2.0 meters per
Q. Illustrate how are amps and watts related? Answer:- In a nutshell the power calculated in watts dissipated by a resistance is directly proportional to the square of the
CENTRE OF GRAVITY: Consider a body as an accumulation of many small masses (molecules), all subject to gravitational attraction. The total weight, which is a force , is
Illustrates some way to by which ultrasonic waves propagated? Detection of Ultrasonic Waves: Ultrasonic waves propagated by a medium can be detected within a number of ways.
An unknown material has a normal melting/freezing point of -26.3° C, and the liquid phase has a specific heat capacity of 160 J/(kg · C°). One-tenth of a kilogram of the solid at -
Lens: A transport refractive body bonded by one or two spherical surface known as lens. There are various kinds of lenses. e.g. Double convex Lens Double concave lens
What is Joule Cycle? Find the efficiency of the Joule cycle, consisting of two isobars and two adiabats. Presume that the heat capacities of the gas C p and C v are constan
A positively-charged subdivision is moving southward in a downward-directed uniform magnetic field. The magnetic force is the merely force if any acting on the particle. Throughout
DISPLACEMENT: The change in the position of a body from its starting position to its final position is known as displacement. It is denoted by d ?.
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