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Ask QuestionPosted by Waheed Ahmed 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Grafting is a horticultural technique used to join parts from two or more plants so that they appear to grow as a single plant. In grafting, the upper part (scion) of one plant grows on the root system (rootstock) of another plant.
In grafting, one plant is selected for its roots, and this is called the stock or rootstock. The other plant is selected for its stems, leaves, flowers, or fruits and is called the scion. The scion contains the desired genes to be duplicated in future production by the stock/scion plant. For successful grafting to take place, the vascular cambium tissues of the stock and scion plants must be placed in contact with each other. Both tissues must be kept alive until the graft has taken, usually a period of a few weeks. Successful grafting requires that a vascular connection takes place between the two tissues.
Grafting is most commonly used for the propagation of trees and shrubs grown commercially. Grafting is limited to dicots and gymnosperms.
Posted by .. .... 5 years, 5 months ago
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Aryan Mishra 5 years, 5 months ago
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- Bases change the colour of litmus from red to blue.
- They are bitter in taste.
- Bases lose their basicity when mixed with acids.
- Bases react with acids to form salt and water. This process is called Neutralisation Reaction(Read).
- They can conduct electricity.
- Bases feel slippery or soapy.
- Some bases are great conductors of electricity.
- Bases like sodium hydroxide, potassium hydroxide, etc are used as electrolytes.
Posted by .. .... 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
- Acids change the colour of litmus from blue to red.
- They convert the colour of Methyl Orange from Orange/Yellow to Pink.
- Acids turn the pink colour of Phenolphthalein to colourless.
- Acids can conduct electricity.
- Some Acids are highly corrosive in nature which means that they corrode or rust metals.
- Acids tend to evolve hydrogen gas whilst reacting with an active metal such as Zn, Mg, etc.
- They produce H+ ions when mixed with water.
Lucifer?? Morningstar?? 5 years, 5 months ago
Posted by Drift? Boi? 5 years, 5 months ago
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? Pranali.A.P ? 5 years, 5 months ago
Yogita Ingle 5 years, 5 months ago
Lightning is one of the most beautiful displays we can see in our nature which can certainly be deadly at times. It is a sudden electrostatic discharge between the electrically charged regions of the cloud. As we know that it occurs due to electrically charged storms but still the method of charging of clouds remains elusive.
Posted by Surendra Tomar Tomr 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Holozoic Nutrition: In holozoic nutrition, the digestion of food follows after the ingestion of food. Thus, digestion takes place inside the body of the organism. Holozoic nutrition happens in five steps, viz. ingestion, digestion, absorption, assimilation and egestion.
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Posted by Lucifer?? Morningstar?? 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
|
Sl. No. |
Differentiating Property |
Motor |
Generator |
|
1 |
Definition |
An electric motor is a machine that converts electrical energy to mechanical energy. |
An electric generator is a machine that converts mechanical energy to electrical energy.` |
|
2 |
Rule |
Electric motor follows Fleming’s left-hand rule. |
Electric generator follows Fleming’s right-hand rule. |
|
3 |
Principle |
Motors works on the principle that a current carrying conductor experiences a force when placed in a magnetic field. |
Generators work on the principle of electromagnetic induction. |
|
4 |
Driving force for shaft |
The shaft of an electric motor is driven by a magnetic force which is developed between the armature and field. |
The shaft of an electric generator is connected to the rotor which is driven by a mechanical force. |
|
5 |
Current Usage |
In a motor, current is supplied to the armature winding. |
In a generator, current is produced in the armature winding. |
|
6 |
Example |
Ceiling fans, cars, etc. are all examples of motor. |
In power stations, generator is used to generate electricity. |
Posted by Ishika ? 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
- It is a crystalline solid which is white in colour.
- It exists as a monohydrated salt (Na2CO3.10H2O), anhydrous salt (Na2CO3), heptahydrous salt (Na2CO3.7H2O) and decahydrate salt (Na2CO3.10H2O).
- Sodium carbonate is basic in nature.
- It has a melting point of 851°C.
- In the presence of heat, it loses its water to form an anhydrous salt (soda ash).
Na2CO3.10H2O → Na2CO3.H2O → Na2CO3 (at 373 K)
Posted by Ishika ? 5 years, 5 months ago
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It is produced by the action of Chlorine on dry slaked lime. It is represented as CaOCl2, though the actual composition is quite complex.
Ca(OH)2 + Cl2 → CaOCl2 + H2O
On standing for a longer time, it undergoes auto oxidation due to which bleaching action decreases.
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Posted by Ishika ? 5 years, 5 months ago
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It is a white powder. When mixed with water (1/3 of its mass), it evolves heat and quickly sets to a hard porous mass within 5 to 15 minutes. During setting, a slight expansion (about 1%) in volume occurs so that it fills the mould completely and takes a sharp impression.
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Yogita Ingle 5 years, 5 months ago
The earth behaves as a magnetic dipole . Therefore a freely suspended magnet always points towards in the north-south direction because the north pole of the suspended magnet attracts the south pole of the earth's magnet which is the geographical north pole of the earth. Similarly the south pole of the suspended magnet attracts the north pole of the earth's magnet which is the geographical south pole of the earth.
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Posted by Avinash Kumar 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
The resistance of the wire will decrease if we made the conductor thicker because R (resistance) = p (rho). l (length) / A (area of cross-section or thickness of wire).Area is directly proportional to the radius of the wire. So as you can see if area of cross-section ( or thickness) of wire increases, resistance decreases and more current flows through it.
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Posted by Rohan Kumar 5 years, 5 months ago
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Meghna Thapar 5 years, 5 months ago
The magnetic field lines around a straight conductor carrying a current are concentric circles. The direction of a magnetic field is given by the Right-Hand Thumb Rule.
Right-Hand Thumb Rule:
Imagine that you are holding a straight current-carrying conductor in your right hand such that the thumb points towards the direction of the current. Then, your curved fingers wrapped around the conductor point in the direction of the field lines of the magnetic field.
The magnitude of the magnetic field due to a straight current-carrying conductor at a given point is
- Directly proportional to the current flowing through the conductor.
- Inversely proportional to the distance of that point from the conductor.
Posted by Love Rathore 5 years, 5 months ago
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Posted by Mithali Pattanaik 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
f=20cm
m=−2(red)
v=2u
Sign convention
u=−ve
v=+ve
f=+ve
Using lens formula,
1/v−1/u=1/f
⇒1/ −2u−1/u = 1/f1
→u=−3f/2 =−3×10/ 2=−15cm
Object should be placed at 15cm in front of the lens.
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