Electrical Materials

Inject more charge carriers ✘ Reduce the energy gap ✘ Increase the kinetic energy of valence electrons ✘ All of the above ✔

Temperature ✘ Resistance ✘ Eddy currents ✘ Coupling coefficient ✔

Holes can exist in certain semiconductors only ✘ Holes can exist in any material including conductors ✘ Holes may constitute an electric current ✘ Holes can be considered as a net positive charge ✔

Extrinsic ✘ Intrinsic ✘ N-type ✘ P-type ✔

Decrease dielectric constant ✘ Decrease dielectric strength ✘ Decrease insulation resistance ✘ All of the above ✔

Transformer, motor and generator windings ✘ Transmission and distribution lines ✘ House wiring ✘ All above applications ✔

Linear ✘ Hexagonal ✘ Orthorhombic ✘ Cubic ✔

Resistance of the conductor ✘ Area of the conductor section ✘ Length of the conductor ✘ All of the above ✔

Highest conductivity ✘ Lowest temperature coefficient ✘ Good mechanical strength & corrosion resistance ✘ All of the above ✔

Copper ✘ Kanthal ✘ Manganin ✘ Nichrome ✔