logo

CuriousTab

CuriousTab

Discussion


Home Electronics and Communication Engineering Materials and Components Comments

  • Question
  • For a multiplate capacitor having n plates, A as area of each plate, the capacitance is proportional to


  • Options
  • A. n A
  • B. (n - 1) A
  • C. (n + 1) A
  • D. For a multiplate capacitor having n plates, A as area of each plate, the capacitance is proportional

  • Correct Answer
  • (n - 1) A 

    Explanation
    If the number of plates is n, the number of capacitors is (n - 1).

    Materials and Components problems


    Search Results


    • 1. At a temperature of about 1 K, aluminium is a

    • Options
    • A. conductor
    • B. insulator
    • C. photoconductor
    • D. superconductor
    • Discuss
    • 2. The circumference of an electron orbit is equal to integer times the wavelength of electron.

    • Options
    • A. True
    • B. False
    • Discuss
    • 3. Permeability is analogous to

    • Options
    • A. resistivity
    • B. retentivity
    • C. conductivity
    • D. coercivity
    • Discuss
    • 4. In a specimen of silicon steel, a field strength of 200 A/m causes a flux density of 0.5 T. In a specimen of cast iron, the same H would cause B to be

    • Options
    • A. 0.5 T
    • B. less than 0.5 T
    • C. more than 0.5 T
    • D. 0.5 T or more or less
    • Discuss
    • 5. Nichrome is used for

    • Options
    • A. overhead line wires
    • B. heater coils
    • C. lamp filaments
    • D. all of the above
    • Discuss
    • 6. A material has N spins per m3. If Np are the dipoles per m3 parallel to field and Na are the dipoles per m3 anti-parallel to field, the magnetisation is

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 7. The resistivity of intrinsic semiconductors, at room temperature, is of the order of

    • Options
    • A. 1 ?-m
    • B. 1000 ?-m
    • C. 106 ?-m
    • D. 10-3 ?-m
    • Discuss
    • 8. The electric dipole moment of a neutral system of point charges Q1, Q2.... is Qiri . The charges Qi

    • Options
    • A. must be all positive
    • B. must be all negative
    • C. must be such that Qi = 0
    • D. either (a) or (b)
    • Discuss
    • 9. If m, v, r are the mass, velocity and radius of orbit of electron and h is Planck's constant, quantum condition for electron's orbit is

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 10. The capacitance of an insulated conducting sphere of radius R in vacuum is

    • Options
    • A. 2p?0R
    • B. 4p?0R
    • C. 4p?0R2
    • D. 4p
    • Discuss


    Comments

    There are no comments.

Enter a new Comment