A dielectric material must be insulator good conductor resistor semiconductor An

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Correct Answer

insulator

Explanation

Any material other than insulator will short-circuit the plates.

Materials and Components problems

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3. 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

5. In a metal, the valence electrons
Options
A. are not shared
B. are shared only between neighbouring atoms
C. are shared by all atoms
D. either (b) or (c)

6. 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

7. Which inductor is used at high frequencies?
Options
A. Cast iron cored
B. Sheet steel cored
C. Iron alloy cored
D. Ceramic cored

9. 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

10. In van der walls crystals, there exists a high degree of stability of the outer electron shell.
Options
A. True
B. False

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