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</html>Posted by Shreya S❤ 6 years ago
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Shreya S❤ 6 years ago
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Kumkum Sarswat 6 years ago
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꧁༺★King K. Tyagi Ji}★༺꧂ ??? 6 years ago
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??(｡☬Ashu☬｡)?? Bhardwaj 6 years ago
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Posted by Ash Greninja 6 years ago
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Yogita Ingle 6 years 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 6 years ago
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Yogita Ingle 6 years ago
When a mixture of copper oxide and copper sulphide is heated, pure copper is obtained.
2Cu2O + Cu2S → 6Cu + SO2
Posted by Shanaya Rawat 6 years ago
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Posted by ]••´º´•» Ｄί?Ş?? «•´º´••[• 6 years ago
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Posted by Sakshi Khulve Sonam 5 years, 11 months ago
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Posted by Aditya Rajpoott Rajpoot 6 years ago
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Posted by ??(｡☬Ashu☬｡)?? Bhardwaj 6 years ago
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Gaurav Seth 6 years 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 6 years ago
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Yogita Ingle 6 years 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 6 years ago
- 2 answers
Posted by Anushka Varshney 6 years ago
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Yogita Ingle 6 years 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´••[• 6 years ago
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Shreya S❤ 6 years ago
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Posted by ]••´º´•» Ｄί?Ş?? «•´º´••[• 6 years ago
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Posted by Manish Aggarwal 6 years ago
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Yogita Ingle 6 years 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 6 years ago
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Shreya S❤ 6 years ago
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