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  • Question
  • In a true valence crystal, the bonding between the atoms is accomplished by the sharing of valence electrons.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • True 

    Explanation
    Sharing of valence electons is a characteristic of true valence crystal.

    Materials and Components problems


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    • 1. Which element exhibits the property of inertia?

    • Options
    • A. Resistance
    • B. Capacitance
    • C. Inductance
    • D. Both resistance and inductance
    • Discuss
    • 2. Assertion (A): Magnetic susceptibility of diamagnetic materials is much less than that of paramagnetic materials.

      Reason (R): For diamagnetic as well as paramagnetic materials, ?r is nearly equal to 1.


    • Options
    • A. Both A and R are true and R is correct explanation of A
    • B. Both A and R are true but R is not correct explanation of A
    • C. A is true but R is false
    • D. A is false but R is true
    • Discuss
    • 3. If the temperature of an extrinsic semiconductor is increased so that the intrinsic carrier concentration is doubled, then

    • Options
    • A. the majority carrier density is doubled
    • B. the minority carrier density is doubled
    • C. the minority carrier density becomes 4 times the original value
    • D. both the majority and minority carrier densities double
    • Discuss
    • 4. Which capacitor-store higher amount of energy?

    • Options
    • A. Air capacitor
    • B. Paper capacitor
    • C. Mica capacitor
    • D. Plastic film capacitor
    • Discuss
    • 5. Assertion (A): Ferroelectric materials have spontaneous polarization.

      Reason (R): Above curie temperature, ? = for ferro-electric materials.


    • Options
    • A. Both A and R are true and R is correct explanation of A
    • B. Both A and R are true but R is not correct explanation of A
    • C. A is true but R is false
    • D. A is false but R is true
    • Discuss
    • 6. The units of ?0 and ?r are

    • Options
    • A. H/m for both
    • B. H/m for ?r and no units for ?0
    • C. H/m for ?0 and no units for ?r
    • D. Wb/m for ?0 and no units for ?r
    • Discuss
    • 7. Assertion (A): If E is available energy state eV and EF is Fermi level, then probability of energy state E being occupied = 0.5.

      Reason (R): .


    • Options
    • A. Both A and R are true and R is correct explanation of A
    • B. Both A and R are true but R is not correct explanation of A
    • C. A is true but R is false
    • D. A is false but R is true
    • Discuss
    • 8. Two materials having temperature coefficients of 0.004 and 0.0004 respectively are joined in series. The overall temperature coefficient is likely to be

    • Options
    • A. 0.08
    • B. 0.04
    • C. 0.001
    • D. 0.0001
    • Discuss
    • 9. If the diameter of a wire is doubled, its current carrying capacity becomes

    • Options
    • A. one-fourth
    • B. half
    • C. twice
    • D. four times
    • Discuss
    • 10. The time constant of the circuit in figure shown.

    • Options
    • A. RC
    • B.
    • C.
    • D.
    • Discuss


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