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</html>Posted by Shreya S❤ 5 years, 9 months ago
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Shreya S❤ 5 years, 9 months ago
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꧁༺★King K. Tyagi Ji}★༺꧂ ??? 5 years, 9 months ago
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????? ?????? 5 years, 9 months ago
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??(｡☬Ashu☬｡)?? Bhardwaj 5 years, 9 months ago
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Posted by Ash Greninja 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
- The potential difference between two points in an electric field is defined as the amount of work done in moving a unit positive charge from one point to another point.
- The SI unit of electric potential difference is volt (V)
Posted by Parav Singh 5 years, 9 months ago
- 1 answers
Yogita Ingle 5 years, 9 months ago
When a mixture of copper oxide and copper sulphide is heated, pure copper is obtained.
2Cu2O + Cu2S → 6Cu + SO2
Posted by Shanaya Rawat 5 years, 9 months ago
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Posted by ]••´º´•» Ｄί?Ş?? «•´º´••[• 5 years, 9 months ago
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Posted by ??(｡☬Ashu☬｡)?? Bhardwaj 5 years, 9 months ago
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Gaurav Seth 5 years, 9 months ago
Frustum of a cone:
Cut a right circular cone with a plane parallel to the base of the cone, then the solid shape between the plane and the base of the cone is called the frustum of a cone.
e.g. Flower pots have a shape as the frustum of a cone.
The surface area and the volume of the frustum of a cone can be calculated using standard formulae.
CSA of the frustum of a cone = πl( r1 + r2).
where r1 = radius of the larger circular face of the frustum, r2 = radius of the smaller circular face of the frustum, and l = slant height of the frustum.
l = h2+(r1-r2)2h2+(r1-r2)2 and h is the height of the frustum.
TSA of a frustum of a cone = πl(r1 + r2) + πr12 + πr22
Volume of the frustum of a cone = (1/3) πh (r12 + r22 + r1 r2)
Posted by Narendra Deshmukh 5 years, 9 months ago
- 1 answers
Yogita Ingle 5 years, 9 months ago
- We know that electric current is the result of the flow of electrons. The work done in moving the electron stream is known as electrical energy. The electrical energy can be converted into other forms of energy such as heat energy, light energy, etc. For example, in an iron box, electric energy is converted to heat energy. Likewise, the electric energy in a bulb is converted into light energy.
- There are two types of electric current known as alternating current (AC) and direct current (DC). The direct current can flow only in one direction, whereas the alternating direction flows in two directions. Direct current is seldom used as a primary energy source in industries. It mostly used in low voltage applications such as charging batteries, aircraft applications, etc. Alternating current is used to operate appliances for both household and industrial and commercial use.
- The electric current is measured in ampere. One ampere of current represents one coulomb of electric charge moving past a specific point in one second.
1 ampere = 1 coulomb / 1 second - The conventional direction of an electric current is the direction in which a positive charge would move. Henceforth, the current flowing in the external circuit is directed away from the positive terminal and toward the negative terminal of the battery.
Posted by Vishwavara Vishwakarma 5 years, 9 months ago
- 2 answers
Posted by Anushka Varshney 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
(a) Roasting of sulphide ore:
2Cu2S(s) + 3O2(s) → 2Cu2O(s) + 2SO2(g)
(b) Reduction of copper (I) oxide with copper (I) sulphide:
2Cu2O + Cu2S → 6Cu(s) + SO2(g)
This reaction is known as auto - reduction.
(c) Reaction for electrolytic refining:
At anode : Cu2+(aq) + 2e- → Cu(s)
At cathode : Cu(s) → Cu2+(aq)+ 2e-
Posted by ]••´º´•» Ｄί?Ş?? «•´º´••[• 5 years, 9 months ago
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Shreya S❤ 5 years, 9 months ago
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Aadya Singh 5 years, 9 months ago
Posted by Manish Aggarwal 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
Reproduction means to reproduce. It is a biological process by which an organism reproduces an offspring who is biologically similar to the organism. Reproduction enables and ensures the continuity of species, generation after generation. It is the main feature of life on earth.
Raghav Somani 5 years, 9 months ago
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Shreya S❤ 5 years, 9 months ago
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