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Ask QuestionPosted by Bad? Boy 5 years, 6 months ago
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Meghna Thapar 5 years, 6 months ago
The production of electricity from magnetism is known as electromagnetic induction.
Electromagnetic or magnetic induction is the production of an electromotive force (i.e., voltage) across an electrical conductor in a changing magnetic field. Michael Faraday is generally credited with the discovery of induction in 1831, and James Clerk Maxwell mathematically described it as Faraday's law of induction.
Let us move the wire AB upward rapidly between the poles of the horseshoe magnet. When the wire is moved up, there is deflection in the galvanometer pointer shows a current is produced in the wire AB momentarily which causes the deflection in galvanometer.
Posted by Bad? Boy 5 years, 6 months ago
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Meghna Thapar 5 years, 6 months ago
Law of floatation is a special condition of Archimedes' Principle which states that the weight of a floating body is equal to the weight of the displaced liquid. Legend says that Archimedes discovered the principle of displacement while stepping into a full bath. He realized that the water that ran over equaled in volume the submerged part of his body. Through further experiments, he deduced the above mentioned Archimedes' principle.
Posted by Bad? Boy 5 years, 6 months ago
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Meghna Thapar 5 years, 6 months ago
Falling drop of a liquid is always spherical in shape due to surface tension. The inward forces on the surface molecules of the liquid droplet tend to cause the surface to volume ratio as small as possible. Liquid drops are spherical because of surface tension. Hence when small amount of liquid is separated from rest in the form of drop, the whole amount of liquid gets in the most energy efficient shape i.e. sphere due to the attraction of atoms/molecules, which we call surface tension.
Posted by Nitin Chaudhary 5 years, 6 months ago
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Meghna Thapar 5 years, 6 months ago
The angle of deviation is the angle between the direction of the refracted ray and the direction of the incident ray when a ray of light passes from one medium to another. The emergent ray is bent at an angle with the direction of the incident ray. This angle is called the angle of deviation. The phenomenon of splitting of white light into its constituent seven colours on passing through a glass prism is called dispersion of light. The smallest angle through which light is bent by an optical element or system. In a prism, the angle of deviation is a minimum if the incident and exiting rays form equal angles with the prism faces. The angle is important relative to prism spectroscopes because it can be easily determined.
Bad? Boy 5 years, 6 months ago
Posted by Bunny ?? 5 years, 6 months ago
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Posted by Bunny ?? 5 years, 6 months ago
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Meghna Thapar 5 years, 6 months ago
An ammeter is a measuring device used to measure the electric current in a circuit. A voltmeter is connected in parallel with a device to measure its voltage, while an ammeter is connected in series with a device to measure its current. The major difference between the ammeter and the voltmeter is that the ammeter measures the flow of current, whereas the voltmeter measures the emf or voltage across any two points of the electrical circuit. For example, an analog voltmeter with a ±3% accuracy is set to the 0 to 100-V range. Based on this accuracy, its pointer can be 3 volts (100 V x 0.03 = 3 V) below or above the true reading. If the true measured value is, for example, 90.0 V, the meter might read between 87 V and 93 V or ± 3.3% of reading.
Posted by Bunny ?? 5 years, 6 months ago
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Samyraj Dhanam 5 years, 6 months ago
Yogita Ingle 5 years, 6 months ago
When aluminium is heated in air then alumonium oxide forms.
4Al + 3O2 → 2Al2O3, Aluminium oxide
Posted by Priyanshu Verma 5 years, 6 months ago
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Yogita Ingle 5 years, 6 months ago
The ratio of potential difference and current is known as Resistance.....
I = V/R.
R= V/I.
Where l is current, V is potential difference and R is resistance.
Posted by Adiba Naaz 5 years, 6 months ago
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Posted by Arjun Singh 5 years, 6 months ago
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Yogita Ingle 5 years, 6 months ago
The mode of nutrition in Amoeba is holozoic.
The various steps involved in the process of nutrition are:
Ingestion: Amoeba ingests food with the help of its finger-like extensions, called pseudopodia. When a food particle approaches Amoeba, it forms pseudopodia around it and forms a food vacuole inside the Amoeba.
Digestion: Various enzymes from the cytoplasm enter into the food vacuole and break them down into simple soluble molecules.
Absorption: The simple soluble food is absorbed by cytoplasm of Amoeba from food vacuoles through the process of diffusion.
Assimilation: Amoeba cell obtains energy from the absorbed food through respiration. This energy is utilised by Amoeba for its growth and repair of the body.
Egestion: When a considerable amount of undigested food gets collected inside Amoeba, its cell membrane ruptures and throws out the undigested food.
Posted by Disha Yadav 5 years, 6 months ago
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Meghna Thapar 5 years, 5 months ago
When one coulomb charge passes through any cross section of the wire per second,the current passing is one ampere. Charge of electron ,e=1.6X10^-19C. n=1/(1.6X10^-19)=6.25X10^18. This number of electrons passes through cross section of a wire carrying 1A current.
I= 220 mA =0.22 A
I = Q/T
0.22 = Q/60
Q= 0.22 x 60 = 13.2 C
Where n= number of electrons
E= charge on electrons = 1.6 x 10-19
13.2 C = n x 1.6 x 10-19
n = 13.2/1.6 x 10-19
n = 8.25 x 1019
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Meghna Thapar 5 years, 6 months ago
A star is called a "sun" if it is the center of a planetary system. A large number of planets have been found that orbit other stars, thus making these stars officially "suns." Chances are that a large percentage of the stars in the galaxy also have planets orbiting them, which would make them suns as well. Most stars are very similar to our sun. In fact the sun is a pretty normal kind of star. It's much brighter than the other stars because it is close by. Even the closest star (other than the sun) is very far away.
Posted by Bunny ?? 5 years, 6 months ago
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Posted by Bunny ?? 5 years, 6 months ago
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Meghna Thapar 5 years, 6 months ago
The various parts of the human eye and their respective functions include:
- Cornea – It helps the light to enter the eyes coming through various objects.
- Iris – It controls the amount of light entering in to the eyes.
- Pupil – It is a hole in middle of iris which adjusts its opening to allow the required amount of light for clearing purpose.
- Ciliary muscles- The focal length of the eyes is changed by the action of ciliary muscles. The ciliary muscles can change the thickness of the soft and flexible eyes lens and hence the focal length which, in turn, changes the converging power of the eyes.
- Eye-lens – It forms the real image of the object on the retina.
- Retina – It is a screen on which the image is formed.
- Optic nerve – These nerves transfers the formed image to the brain.
Posted by Ishika ? 5 years, 6 months ago
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Meghna Thapar 5 years, 6 months ago
Each cranial nerve is paired and is present on both sides. There are conventionally twelve pairs of cranial nerves, which are described with Roman numerals I–XII. Some considered there to be thirteen pairs of cranial nerves, including cranial nerve zero.
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Insha Fatima 5 years, 6 months ago
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