1 Answer

Answer :

A semiconductor is formed by Covalent bonds.

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Last Answer : Which of the following is true regarding the band-gap energy of a semiconductor ? (A) Minimum energy required to break a covalent bond (B) On breaking of the bond, electron is generated (C) On breaking of the bond, electron-hole pair is generated (D) A & C both are true

Description : At very high temperatures, extrinsic semiconductor becomes intrinsic semiconductor because (A) Of drive in diffusion of dopants & carriers. (B) Band to band transition dominates impurity ionization. (C) ... band to band transition. (D) Band to band transition is balanced by impurity ionisation.

Last Answer : At very high temperatures, extrinsic semiconductor becomes intrinsic semiconductor because Impurity ionization dominates band to band transition.

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Last Answer : The polar bonds existing in III-V compound semiconductor, may be considered as equivalent to 1 ionic bond and 3 covalent bonds

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Last Answer : Point-contact.

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Last Answer : d) M–Type

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Last Answer : It   becomes   positively  charged    atom.

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Last Answer : Ferrites  are  types  of  magnetic  material.

Description : In which material, valence electrons are tightly bounded to their parent atoms ? (a) Conductor (b) Semiconductor (c) Insulator (d) Magnetic 

Last Answer : insulator(b)

Description : If temperature of a pure silicon specimen is increased, then (a) only number of free electrons increase. (b) only number of free holes increase. (c) number of free holes and free electrons increases. (d) only number of free holes decrease. 

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Description : A material has conductivity of 10–2 mho/m and relative permittivity of 4. The frequency at which the conduction current in the medium is equal to the displacement current, is (a) 450 MHz (b) 900 MHz (c) 45 MHz (d) 90 MHz

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Last Answer : B

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Description : The transferred electron bulk effect occurs in

Last Answer : The transferred electron bulk effect occurs in Gallium Arsenide

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Last Answer : A compact microstrip antenna may be obtained by cutting slot on the patch

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Last Answer : Frequency is inherently a physical quantity with characteristics. Positive 

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Last Answer : The degree of coupling depends location of holes

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Description : In any atom the potential energy of an orbiting electron is   (A) always positive (B) always negative (C) sometime positive, sometime negative (D) numerically less then its kinetic energy.

Last Answer : In any atom the potential energy of an orbiting electron is always negative 

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Last Answer : In order to generate electron-hole pairs, the maximum wavelength of radiation for Silicon (Band gap = 1.1 eV) is 1.13 μm

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Last Answer : In   a  metal  wire  the  particles   responsible  for  carrying  electric  current  are  holes.

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Last Answer : Silicon dioxide is an insulator

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Last Answer : A forward-biased PN-junction,  results in increase in diffusion current 

Description : In a PN-junction with open circuit terminal (equilibrium), with P doping higher as compared to N doping (A) N-side depletion region is small as compared to p-side depletion region (B) N-side ... depletion region (C) N-side depletion region is same as p-side depletion region (D) Cannot say

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Description : The velocity of travelling wave through a cable of relative permittivity 36 is

Last Answer : The velocity of travelling wave through a cable of relative permittivity 36 is 0.5 x 108 m/sec

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Last Answer : The average life of neutrons after they decay is 10 sec

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Last Answer : the wavelength of X-ray is of the same order of magnitude in the inter atomic spacing in crystals 

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Last Answer : answer:

Description : Why Chemical Bonds Are Formed ?

Last Answer : It is difficult to say the exact cause of chemical bonding. Chemists, however, believe that chemical bonds are caused by the attachment of elements to each other.

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Last Answer : Answer : C

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Last Answer : Answer : A

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Last Answer : Answer : C

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Last Answer : Answer : A

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Last Answer : Answer : C

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Last Answer : Answer : D

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Last Answer : Answer : A

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Last Answer : Answer : B

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Last Answer : Answer : D

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Last Answer : Ans:(c)

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Last Answer : (1) Covalent bonds Explanation: Bonds which are formed by the sharing of an electron pair between two atoms are known as covalent bonds.