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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.
What is the difference between vibration and waves?
Resistance in Series: In such a combination the resistors give a single path to the passage of current and similar current passes by each of the resistors.
Faraday's laws of electromagnetic induction (M. Faraday) Faraday's first law of electromagnetic induction An electromotive force is induced into a conductor while the m
IN PHYSICS B OCR THE POTENTIAL DIVIDER AND CALCULATION ON LENS ARE TRICKY. HOW DO I APPROACH AND UNDERSTAND QUESTIONS?
a metal wire 75.0 cm long and 0.130 cm in diameter stretches 0.0350 cm when a load of 8.00 kg is hung on its end. find the stress, the strain and the young''s modulud for the mater
What is the measure of the force of gravity on an object? Force is the vector product of mass and acceleration: F = ma. Weight is a special case of that formula, where you subs
state the conditions under which two forces form a couple and give an example of couple
What is the work done to take a particle of mass m from surface of the earth to a height equal to 2R (R=radius of earth )? Ans) Initial PE= - GMm/R Final PE = - GMm/3R
Ca has atomic no. 20 and atomic weight 40. Which of the following statements is not correct about Ca atom: (1)The number of electrons is same as the number of neutrons (2)
snth=u+a/2(2n-1)
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