A crystal diode is a
|
(a) Non-linear device |
(b) Amplifying device |
(c) Linear device |
(d) Fluctuating device |
A crystal diode is a
|
(a) Non-linear device |
(b) Amplifying device |
(c) Linear device |
(d) Fluctuating device |
(a) Non-linear device
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Assertion : Microwave propagation is better than the sky wave propagation.
Reason : Microwaves have frequencies 100 to 300 GHz, which have very good directional properties.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
Which is the correct relation for forbidden energy gap in conductor, semi conductor and insulator
|
(a) |
|
(b) |
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(c) |
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(d) |
The width of forbidden gap in silicon crystal is 1.1 eV. When the crystal is converted in to a N-type semiconductor the distance of Fermi level from conduction band is
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(a) Greater than 0.55 eV |
(b) Equal to 0.55 eV |
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(c) Lesser than 0.55 eV |
(d) Equal to 1.1 eV |
The rest mass of an electron as well as that of positron is 0.51 MeV. When an electron and positron are annihilate, they produce gamma-rays of wavelength(s)
|
(a) 0.012 Å |
(b) 0.024 Å |
(c) 0.012 Å to ¥ |
(d) 0.024 Å to ¥ |
The current through an ideal PN-junction shown in the following circuit diagram will be

|
(a) Zero |
(b) 1 mA | (c) 10 mA | (d) 30 mA |
If the atom
follows the Bohr model and the radius of
is n times the Bohr radius, then find n
|
(a) 100 |
(b) 200 |
(c) 4 |
(d) |