A hole in a P-type semiconductor is
| (a) An excess electron | (b) A missing electron |
|
(c) A missing atom |
(d) A donor level |
A hole in a P-type semiconductor is
| (a) An excess electron | (b) A missing electron |
|
(c) A missing atom |
(d) A donor level |
(b) A missing electron
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In Young’s double slit experiment, the central bright fringe can be identified
|
(a) By using white light instead of monochromatic light |
|
(b) As it is narrower than other bright fringes |
|
(c) As it is wider than other bright fringes |
|
(d) As it has a greater intensity than the other bright fringes |
The resistance of a reverse biased P-N junction diode is about
|
(a) 1 ohm |
(b) |
(c) |
(d) |
The age of universe is believed to be
|
(a) 1 billion years |
(b) 10 billion years |
(c) 10-20 billion years |
(d) 1000 billion years |
Capacitance of a parallel plate capacitor becomes 4/3 times its original value if a dielectric slab of thickness t = d/2 is inserted between the plates (d is the separation between the plates). The dielectric constant of the slab is
|
(a) 8 |
(b) 4 |
(c) 6 |
(d) 2 |
If a current is passed in a spring, it
|
(a) Gets compressed |
(b) Gets expanded |
(c) Oscillates |
(d) Remains unchanged |
For the given circuit of PN-junction diode, which of the following statement is correct

|
(a) In forward biasing the voltage across R is V |
|
(b) In forward biasing the voltage across R is 2V |
|
(c) In reverse biasing the voltage across R is V |
|
(d) In reverse biasing the voltage across R is 2V |
At a place, the horizontal and vertical intensities of earth's magnetic field is 0.30 Gauss and 0.173 Gauss respectively. The angle of dip at this place is
| (a) 30° | (b) 90° | (c) 60° | (d) 45° |
What is the net force on a Cl– placed at the centre of the bcc structure of CsCl

|
(a) Zero |
(b) |
(c) |
(d) Data is incomplete |