Explanation:
Holes from p-type diffuse into the n-type and electrons from n-type diffuse into the p-type due to concentration gradient to form a depletion region which results in the rise of diffusion current flowing from p to n side.
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PQRS is a square loop made of uniform conducting wire the current enters the loop at P and leaves at S. Then the magnetic field will be
|
(a) Maximum at the centre of the loop |
(b) Zero at the centre of loop |
|
(c) Zero at all points inside the loop |
(d) Zero at all points outside of the loop |
The X-ray wavelength of 
line of platinum (Z=78) is 1.30 
The X –ray wavelength of line of Molybdenum (Z = 42) is
|
(a) 5.41Å |
(b) 4.20Å |
(c) 2.70Å |
(d) 1.35 Å |
The velocity of light in a medium is half its velocity in air. If ray of light emerges from such a medium into air, the angle of incidence, at which it will be totally internally reflected, is
|
(a) 15o |
(b) 30 o |
(c) 45 o |
(d) 60 o |
In which of the following the final image is erect?