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MCQs 1: The covalent bond is formed by_______________?

transfer of electrons between atoms sharing of electrons between atoms sharing of variable number of electrons by a variable number of atoms none of the above
Answer Explanation

MCQs 2: The tiny block formed by the arrangement of a small group of atoms is called the____________?

unit cell space lattice either A. or (b) none of the above
Answer Explanation

MCQs 3: is a negatively charged particle present in an atom______________?

Proton Neutron Electron None of the above
Answer Explanation

MCQs 4: The converse of hardness is known as______________?

malleability toughness softness none of the above
Answer Explanation

MCQs 5: The formula __________ determines the number of electrons that can be accommodated in any level?

2n2 4n2 2n3 4ns
Answer Explanation

MCQs 6: A perfect conductor has_____________?

zero conductivity unity conductivity infinite conductivity none of the above
Answer Explanation

MCQs 7: Commonly used conducting materials are_____________?

copper aluminium both (A) and (B) copper and silver platinum and gold
Answer Explanation

MCQs 8: The kinetic energy of a bounded electron is______________?

less than that of unbounded electron greater than that of unbounded electron equal to that of unbounded electron infinite none of the above
Answer Explanation

MCQs 9: The metal having the lowest temperature coefficient of resistance is_________________?

gold copper aluminium kanthal
Answer Explanation

MCQs 10: The co-ordination number of a simple cubic structure is______________?

2 4 6 8
Answer Explanation

MCQs 11: A highly conductive material must have___________?

highest conductivity lowest temperature co-efficient good mechanical strength good corrosion resistance all of the above
Answer Explanation

MCQs 12: Which of the following materials is preferred for transmitting electrical energy over long distance ?

Copper Aluminium Steel reinforced copper Steel reinforced aluminium
Answer Explanation

MCQs 13: Superconductors are becoming popular for use in________________?

generating very strong magnetic field manufacture of bubble memories generating electrostatic field generating regions free from magnetic field
Answer Explanation

MCQs 14: The superconductivity is due to____________?

the crystal structure having no atomic vibration at 0°K all electrons interact in the super-conducting state the electrons jump into nucleus at 0°K none of the above
Answer Explanation

MCQs 15: The conductivity of a conductor can be increased by_______________?

decreasing its temperature increasing its temperature decreasing its vibration increasing its vibration
Answer Explanation

MCQs 16: In a superconductor the value of critical density depends upon______________?

magnetic field strength temperature either (A) or (B) both (A) and (B)
Answer Explanation

MCQs 17: High resistivity materials are used in_____________?

precision instruments heating elements motor starters incandescent lamps all of the above
Answer Explanation

MCQs 18: highest conductivity_____________?

lowest temperature co-efficient good mechanical strength good corrosion resistance easy solderable and drawable quality all of the above
Answer Explanation

MCQs 19: Superconductivity is observed for____________?

infrared frequencies d.c. and low frequency a.c. and high frequency frequencies having no effect none of the above
Answer Explanation

MCQs 20: The value of critical field below the transition temperature will_______________?

increase decrease remain unchanged any of the above
Answer Explanation

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