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Q. Give any three properties of electric lines of force.
Properties of lines of forces: (i) Lines of force begin from positive charge and terminate at negative charge. (ii) Lines of force certainly not intersect. (iii) The departure to a line of force at any point gives the direction of the electric field (E) at that point.
Internal Resistance of Circuit: As mentioned earlier in the section on batteries, every source of electricity, such as a cell or generator has resistance to current flow called
Primary cell Is that cell in which electrical energy is produced because of chemical energy. In the primary cell, chemical reaction is irreversible. This cell cannot be recharged.
P-Type Substance: When a small quantity of boron or Indium (group III A elements ) is added to silicon or Germanium, holes are formed in it and it becomes good conductor of pos
Q. How is radiation release from the body? Answer:- The body radiates energy by thermal conduction through the skin to the clothes, air, and so on around the body. A littl
A steel ring of mean diameter 120mm is uniformly woundwith 1500 turns of wire. When a current of 0.30A is passed by the coil a flux density of 1.5 T is set up in the steel.
experimental values
According to Eisenstein's quantum theory light propagates in the bundles of power, every packet being called as photon and possessing energy.
working and construction of interferometer
Particles of the medium implement simple harmonic motion about their mean position in a direction perpendicular to the direction of propagation of wave motion. (i) It goes in th
What is the wavelength of electromagnetic waves of frequency 5 x 1019Hz in free space? Give its two applications.
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