In conductors conduction of electricity takes place due to movement of

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In conductors conduction of electricity takes place due to movement of electrons only.

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Pick out the wrong statement. (A) Fluid movement under the influence of buoyant forces resulting from change in density takes place in case of natural convection (B) The ratio NNu /NRe . Npr is called the Stanton number (C) The Peclet number is a measure of the ratio of energy transport by convection to that by conduction (D) The Colburn jH factor for heat transfer is given by Nst Npr

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Two long parallel conductors carry 100 A. If the conductors are separated...

Description : Two long parallel conductors carry 100 A. If the conductors are separated by 20 mm, the force per meter of length of each conductor will be

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The force between two long parallel conductors is inversely proportional to

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In case of semi-conductors, the ratio of conduction current to displacement current is:

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Water conduction takes place in mosses through (1) Xylem and Phloem (2) Xylem (3) Collenchyma (4) Parenchyma

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Which property of metals make them good conductors of electricity?

Description : Which property of metals make them good conductors of electricity?

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Last Answer : Ans:(b)

Which of the following is false? (1) Most carbon compounds are poor conductors of electricity. (2) The force of attraction between carbon molecules is not very strong. (3) The atomic number of carbon is 6. (4) The earth’s crust has about 2% carbon in the form of minerals.

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Super conductors are substances that – (1) offer minimum resistance to flow of electric current (2) conduct electricity at low temperature (3) conduct electricity at high temperature (4) offer high resistance to the flow of electric current

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Metals are good conductors of electricity because - (1) they contain free electrons (2) the atoms are lightly packed (3) they have high melting point (4) All of the above

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Metals are good conductors of electricity because – (1) they contain free electrons (2) the atoms are lightly packed (3) they have high melting point (4) All of the above

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Which of the following are bad conductors of electricity? (1) Mica and Quartz (2) Metals and Rubber (3) Metals and Mica (4) Mica and Rubber

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Pick out the correct statement. (A) Plastics are good conductors of heat and electricity (B) All the polymers are highly crystalline in nature (C) Polymers can be vaporised by heating to a very high temperature (D) The liquid polymer becomes greasy, then waxy and finally solid on increasing the degree of polymerisation

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Super conductors are those substances, which (A) Offer no resistance to current flow (B) Conduct electricity at low temperature (C) Offer high resistance to current flow (D) Conduct electricity at high temperature

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Metals are good conductors of electricity because they have: (a) Large number of bounded electrons (b) Small number of electrons (c) Large number of free electrons (d) Small number of free electrons

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Which of the following statement is correct: (a) Similar charges attract each other (b) Similar charges attract and repel each other (c) Similar charges repel each other (d) Similar charges neither attract nor repel 9. Metals are good conductors of electricity because they have:

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Plastics are (A) Good conductors of heat. (B) Good conductors of electricity. (C) Bad conductors of electricity. (D) High density.

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Super conductors are substances that (1) offer minimum resistance to flow of electric current (2) conduct electricity at low temperature (3) conduct electricity at high temperature (4) offer high resistance to the flow of electric current

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Depending on the method of conduction of electricity, the electric conductor can be divided into how many parts ?

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State the types of conduction of electricity.

Description : State the types of conduction of electricity.

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A process by which heat is transferred through a material without a bulk movement of the material.  a. Convection  b. Conduction  c. Radiation  d. Emission

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Surface resistance of an insulating material is reduced due to the

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The superconductivity is due to

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What is the difference between the manner in which movement takes place in a sensitive plant and the movement in our legs ? -Biology-10

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How does the movement of substances takes place in the cell ? -Biology

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Downward movement of food synthesized in leaves takes place through

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During Osmosis, movement of water takes place from

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Pick out the wrong statement. (A) The binary diffusivity in liquids is of the order of 10 -5 cm2 /sec (B) Molecular diffusion in solid is much faster than that in liquids (C) Particles movement from higher concentration to lower concentration takes place in diffusion process (D) According to Poiseuille's law, the permeability decreases with increase in temperature for flow of a gas through a given capillary

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What exactly is cloud computing? a) A way to organize desktop computers b) Lightweight software that takes up little space on a hardware c) Computing resources that can be accessed on demand, like electricity from a utility d) The World Wide Web

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Ceramic materials (A) Are exemplified by clay and mica (B) Are poor electrical conductors due to lack of free electrons (C) Never exhibit polymorphism (D) All (A), (B) and (C)

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Galloping in transmission line conductors arises generally due to

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The skin effect in conductors is due to non uniform distribution of current in it and major portion of current is

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The tubular and dorsal nervous system of chordates is related to the cephalization in these animals and to bilateral symmetry. The presence of neural integrating centers with concentration of neurons in the brains and the spinal cord (central nervous system, CNS) allowed the increase of the interaction complexity between these animals and the environment. Receptor (afferent conduction) and efferent (motor, regulatory and behavioral reactions) functions come out more sophisticated in chordates due to the presence of more well-developed neural networks. These features have been preserved by evolution as they provide adaptive advantage to their owners.

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Trade winds are due to – (1) Conduction (2) Convection (3) Radiation (4) Scattering

Description : Trade winds are due to – (1) Conduction (2) Convection (3) Radiation (4) Scattering

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