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At 400.0 K, germanium has 1.13 x 10 15 free electrons/cm 3 . How many free electrons per Ge atom are there at this temperature? At 400.0 K, silicon has 4.54 x 10 12 free
Q. What do you mean by Time Dilation? To an observer a moving clock always appears to run slower. The time interval between two events occurring at a given point in space in a
Q. What are the various energy losses of a transformer? Energy losses in a transformer: (a) Hysteresis loss (b Copper loss (c) Eddy current loss (Iron loss) (d)
The focal length of a concave mirror is 2 meters. An object is positioned 8 meters in front of the mirror. Where is the image of this object formed? Ans: The image of given ob
The least count of the stopwatch is 0.1 second because in stopwatch we can measure milliseconds also...
Magnetic materials: Ferromagnetic materials: Ferromagnetic materials can be easily magnetised and exhibit strong magnetic properties. This group can be further sub
Can we take a negative test charge to find electric field?
Compare and contrast the pattern which is seen with two coherently illuminated narrow slits in Young's experiment with that seen for a coherently illuminated one slit producing dif
Gravitational field can also be shown by lines of force. This is same in several ways as that of electric lines of forces. With one dissimilarity, electric charges are negative and
A see-saw lever Get a thick plank about 3 m long and bring it into the class room. Balance it over a box or some other suitable device and let the pupils experiment with the se
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