Donor type impurity is found in
|
(a) Trivalent elements |
(b) Pentavalent elements |
|
(c) In both the above |
(d) None of these |
Donor type impurity is found in
|
(a) Trivalent elements |
(b) Pentavalent elements |
|
(c) In both the above |
(d) None of these |
(b) Pentavalent elements
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Fraunhofer lines of the solar system is an example of
|
(a) Emission spectrum |
(b) Emission band spectrum |
|
(c) Continuous emission spectrum |
(d) Line absorption spectrum |
In a parallel beam of white light is incident on a converging lens, the colour which is brought to focus nearest to the lens is
|
(a) Violet |
(b) Red |
|
(c) The mean colour |
(d) All the colours together |
The process by which a heavy nucleus splits into light nuclei is known as
|
(a) Fission |
(b) α- decay |
(c) Fusion |
(d) Chain reaction |
In the figure a capacitor is filled with dielectrics. The resultant capacitance is
|
(a) |
(b) |
(c) |
(d) None of these |

In the following Wheatstone bridge P/Q = R/S. If key K is closed, then the galvanometer will show deflection
|
(a) In left side |
(b) In right side |
(c) No deflection |
(d) In either side |