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Home ‣ Electronics and Communication Engineering ‣ Materials and Components Comments
  • Question

  • Fleming's left hand rule is used to find


  • Options
  • A. direction of force on a current carrying conductor
  • B. direction of flux in solenoid
  • C. direction of magnetic field due to a current carrying conductor
  • D. direction of induced emf

  • Correct Answer
  • direction of force on a current carrying conductor 

    • Materials and Components problems

    Search Results

    • 1. A dielectric material must be

    • Options
    • A. insulator
    • B. good conductor
    • C. resistor
    • D. semiconductor
      • Discuss
    • 2. Magnetisation of a material is the magnetic dipole moment per m3.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. If m is the mass of electron cloud, the equation of motion of electron cloud in the presence of an alternating electric field is of the form

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 4. The rule that resistivity of conductors can be separated into two parts viz. temperature independent and temperature dependent is known as

    • Options
    • A. Matthiessen's rule
    • B. Debye rule
    • C. Curie rule
    • D. Onne's rule
      • Discuss
    • 5. The dielectric losses do not depend on frequency.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. Which inductor is used at high frequencies?

    • Options
    • A. Cast iron cored
    • B. Sheet steel cored
    • C. Iron alloy cored
    • D. Ceramic cored
      • Discuss
    • 7. A vacant electronic state moves in the same direction as would a positive charge carrier.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. By inserting a plate of dielectric between the plates of a parallel plate capacitor, the energy stored in the capacitor is increased five times. The dielectric constant of material is

    • Options
    • A.
    • B.
    • C. 5
    • D. 25
      • Discuss
    • 9. In van der walls crystals, there exists a high degree of stability of the outer electron shell.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. A vacuum parallel plate capacitor is charged. The field between the plates is 2 x 104 V/m. If the space between the plates is filled with a material having ?r = 10, then the value of field in the dielectric will be

    • Options
    • A. 2 x 103 V/m
    • B. x 104 V/m
    • C. 210 x 104 V/m
    • D. 2 x 105 V/m
      • Discuss

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