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Ask QuestionPosted by Shashi Sharma 6 years, 2 months ago
- 1 answers
Yogita Ingle 6 years, 2 months ago
Transformers
- A transformer is a device that changes voltage from one value to another.
- Power at the input end is equal to the power at the output end.
- Only the voltage will increase or decrease.
Principle:-
Transformers work on the principle of Mutual induction.
Mutual Induction :- Suppose there are 2 inductors if some current flows through coil(1) ,there will be change in the current as a result there will be change in the magnetic flux, as a result there will be change in the magnetic flux in the coil (2) and because of which emf is induced in the coil(2).
Posted by Shashi Sharma 6 years, 2 months ago
- 1 answers
Yogita Ingle 6 years, 2 months ago
Transformers
- A transformer is a device that changes voltage from one value to another.
- Power at the input end is equal to the power at the output end.
- Only the voltage will increase or decrease.
Principle:-
Transformers work on the principle of Mutual induction.
Mutual Induction :- Suppose there are 2 inductors if some current flows through coil(1) ,there will be change in the current as a result there will be change in the magnetic flux, as a result there will be change in the magnetic flux in the coil (2) and because of which emf is induced in the coil(2).
Posted by Shashi Sharma 6 years, 2 months ago
- 2 answers
Yogita Ingle 6 years, 2 months ago
Transformers
- A transformer is a device that changes voltage from one value to another.
- Power at the input end is equal to the power at the output end.
- Only the voltage will increase or decrease.
Principle:-
Transformers work on the principle of Mutual induction.
Mutual Induction :- Suppose there are 2 inductors if some current flows through coil(1) ,there will be change in the current as a result there will be change in the magnetic flux, as a result there will be change in the magnetic flux in the coil (2) and because of which emf is induced in the coil(2).
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In an earthen pot, water gets evaporated quickly through the pores. Cooling is caused by evaporation. Some heat energy is utilised during the process of evaporation. Since this energy is taken from the water itself, it leads to a lowering of temperature in the remaining amount of water.
Posted by Nikhil Sathya 6 years, 2 months ago
- 3 answers
Gaurav Seth 6 years, 2 months ago
X³ - 3x² - 9x - 5
= x³ + x² - 4x² - 4x - 5x - 5
= x²( x + 1) - 4x ( x + 1) - 5(x + 1)
= (x + 1)(x² - 4x - 5)
= (x + 1)(x² -5x + x - 5)
= (x + 1)(x - 5) (x + 1)
hence, (x +1), (x -5) and (x +1) are the factors of given polynomial .
OR
x3 - 3x2 - 9x - 5
Let p(x) = x3 - 3x2 - 9x - 5
By trial, we find that
p(- 1) = (- 1)3 - 3(- 1)2- 9(- 1) -5
= - 1 - 3 + 9 - 5 = 0
∴ By Factor Theorem, x - (- 1), i.e., (x + 1) is a factor of p(x).
Now,
x3 - 3x2 - 9x - 5
= x2(x + 1) - 4x(x + 1) - 5(x + 1)
= (x + 1)(x2- 4x - 5)
= (x + 1)(x2 - 5x + x - 5)
= (x+ 1){x(x - 5) + 1 (x - 5)}
= (x + 1)(x - 5)(x + 1).
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- 3 answers
Sonali Maurya 6 years, 1 month ago
Yogita Ingle 6 years, 2 months ago
Acceleration is rate of change of velocity with time. It is denoted by ‘a’ and the SI unit is m/s2.
Posted by Puspanjali Kamila 6 years, 2 months ago
- 1 answers
Yogita Ingle 6 years, 2 months ago
Density of water varies with temperature. It is highest at 4 oC. At low tempreature, When ice is formed, density is reduced. So At low temprature in ocean, A layer of Ice floats on water and below this layer, all aquatic species can survive. At high temeperature, Warm water of ocean causes vast currents which circulate heat from equator to temperate zone. Hence, play role in controlling climate of whole earth.
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Shubham Danu 6 years, 1 month ago
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