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The I-V graph of metallic conductor is a straight line pass through the origin. They obey Ohm’s Law, having resistance that is independent of current. (Ohmic conductors)
Reason: Resistance in metal is the reduction of the drift velocity of electrons due to collision with the lattice ions. If the temperature of the conductor is kept constant, the magnitude of the vibration of the lattice ions remain the same, and hence it’s resistance would remain the same.
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It has polished flat surfaces that refract light. The traditional geometric shape of a prism has a triangular base and two rectangular sides. It is called triangular prism. When light travels from one medium to another medium, it is refracted and enters the new medium at a different angle.
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- Dental Caries or tooth decay is described as the malfunctioning or damage of teeth due to the acids produced by bacterias.
- These acids attack the enamel of the tooth which eventually leads to the development of a hole in a tooth known as the cavity.
- This problem is often seen in children, adults, and teenagers. This may lead to infection, serious toothache, or tooth loss as well.
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When iron nails are brought near one end of a magnet, the nearer end of piece acquires an opposite polarity by magnetic induction. Since unlike poles attract each other, therefore, iron nails are attracted towards the end of the magnet. Thus, the iron nail first becomes a magnet by induction and then it is attracted.
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Oxides of metals which have both acidic as well as basic behaviour are known as amphoteric oxides. Such metallic oxides react with acids as well as base to produce salt and water. Examples of Amphoteric oxides are aluminium oxide and zinc oxide.
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Answer: Ionic compounds are formed by transfer of electrons between metals and non metals resulting into cations and anions respectively. They are held by strong electrostatic forces and thus cannot be separated.
But when ionic compounds are dissolved in water, they result into ions due to high dielectric constant of water, thus the production of ions help to carry electrons and thus conduct electricity.
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Current and Resistance in series connection of resistors
- Series connection is a combnation of resistors connected end to end.
- It forms a linear connection arrangement of all the resistors connected in series.
- So the amount of current flowing through each resistor is equal to the amount of current flowing through the entire circuit.
- Thus, in series connection the current remains same across the resistors.
- The equivalent resistance of such resistors is given by the sum of resistances of all the resistors connected in series.
- Mathematically,
- This explains that the resistance of the entire circuit of resistors connected in series will be more than the resistance of the individual resistors.
- Resistance is the actual resistance to the flow of current through the circuit.
- Therefore as the equivalent resistance of the resistors connected in series gets added up, the flow of current in a series circuit decreases due to this added resistance.
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Large Intestine
This is a thick, long tube measuring around 5 feet in length. It is present just beneath the stomach and wraps over the superior and lateral edges of the small intestine. It absorbs water and consists of bacteria (symbiotic) that support the breakdown of wastes to fetch small nutrients.
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Yogita Ingle 5 years, 3 months ago
Simple organisms are capable of producing new organisms through the process of regeneration. This is possible in simple organisms because the entire body is made up of similar kind of cells in which any part of their body can be formed by growth and development.
In case of the complex organisms have organ system level organization. all the organ systems of their body work together as an interconnected unit.
The tissues in complex organisms cannot regenerate a new individual as they are highly differentiated to perform specialized functions. For example, human skin cannot regenerate into a new individual as it is a highly differentiated tissue performing a designed function.
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