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Yogita Ingle 5 years, 7 months ago
Acids that give high concentration of H+ ions on ionisation in aqueous solution are said to be strong acids and acids which give less H+ ions on ionisation in aqueous solution are said to be weak acids.
Examples of Strong acids : Hydrochloric acid and nitric acid
Examples of Weak acids : Acetic acid and formic acid
Nitish Singh 5 years, 7 months ago
Posted by Arjun Kashyap 5 years, 7 months ago
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Yogita Ingle 5 years, 7 months ago
- When the current begins to flow, current flows through brush X, then A to B, B to C, C to D and then to brush Y and into the battery.
- Now applying Fleming's Left Hand Rule to wire AB, Current is along AB, Magnetic Field is as shown (North-> South), the motion of the wire is downwards.
- Now applying Fleming's Left Hand Rule to wire CD, Current is along CD, Magnetic Field is as shown (North-> South), the motion of the wire is upwards.
- The rectangular coil begins to move in the anti-clockwise direction
- Note that during anti-clockwise motion, the split rings and axle also move, whereas the brushes don't move.
- After half a rotation, Wire CD and Split ring Q moves to the left. Wire AB and Split ring P moves to right. Brushes X and Y donot move.
- Now applying Fleming's Left Hand Rule to wire CD, Current is along DC. (Battery -> Split ring Q -> DC , Magnetic Field is as shown (North-> South), the motion of the wire is downwards.
- Now applying Fleming's Left Hand Rule to wire AB, Current is along BA. (Battery -> Split ring Q -> DC --> CB -> BA --> Split ring P) , Magnetic Field is as shown (North-> South), the motion of the wire is upwards.
- So, again the coil rotates in the anti-clockwise direction.
- The reversal of current in the coil results in the continous rotation of the coil. The reversal of current is achieved by the commutator rings
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Yogita Ingle 5 years, 7 months ago
The industrial working classes did not participate in the Civil Disobedience Movement in large numbers, except in the Nagpur region. This was because industrialists were supporting the Movement and Congress was reluctant to include workers’ demand as part of the Movement.
Demands of workers
(i) They demanded higher wages.
(ii) They demanded proper working conditions
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Meghna Thapar 5 years, 6 months ago
The Linguistic diversity of India can be understood by a simple folklore which states that for every couple of miles the taste of water change and for every three miles or so the language(spoken). Since India is a multilingual and multi racial country this holds true for every state throughout the nation. Linguistic diversity is a way to talk about varied types of traits including language family, grammar, and vocabulary. A language family is a group of languages with related origins that share some traits.
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Arjun Kashyap 5 years, 7 months ago
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Yogita Ingle 5 years, 7 months ago
It means a belief that the majority community should be able to rule a country in whichever way it wants, by disregarding the wishes and needs of the minority, e.g., Sri Lanka opted for majoritarianism in which majority Sinhalas rule the country.
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The non-cooperation movement was launched on 1st August 1920 by the Indian National Congress (INC) under the leadership of Mahatma Gandhi. It signified a new chapter in the history of Indian freedom struggle.
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|
Motor |
Generator |
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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.` |
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Electric motor follows Fleming’s left-hand rule. |
Electric generator follows Fleming’s right-hand rule. |
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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. |
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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. |
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In a motor, current is supplied to the armature winding. |
In a generator, current is produced in the armature winding. |
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Ceiling fans, cars, etc. are all examples of motor. |
In power stations, generator is used to generate electricity. |
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