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A man exerts a force of 310 N on a lever to raise a crate with a mass of 910 kg. If the efficiency of the lever is 78 percent, what is the lever's IMA?
What is meant by tunnelling phenomenon? A tunnel diode is a high conductivity two-terminal P-N junction doped heavily about 1,000 times higher than a conventional junction diod
Explain the term 'resistivity' and write its S. I . unit. Derive the expression for the resistivity of a conductor in terms of number density of free electrons and relaxation time.
Hard Ferromagnetic Substances: Those substances that do not lose their magnetism or removing from magnetic field are known as hard magnetic substance such as steel.
determine the magnitude of Poynting vector end the energy per unit time delivered to a wire of length land cross section A when electric current I flow in it
Explain the Nuclear Notation? Chemical reactions deal with the number of electrons exchanged or shared. Nuclear reactions, on the other hand, involve protons and neutrons and
What are radiation hazards? Mention four safety measures which should be taken against radioactive radiation. OR Explain radio isotopes? Write their any four uses. Descri
how would you describe the discoveries of Benjamin franklin, Robert millikan, cgarles-augastin de coulomb and Ernest ruthford?
Scanning is process of dividing an image on the screen into a large number of very small squares formed by sets of horizontal and vertical straight lines. Iconoscope i
Q. Give the differences between hard X-rays and soft X-rays.
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