A. Organic polymers
B. Silicon
C. Metals
Which of the following materials does not have covalent bonds ? Read More »
Electrical Engineering Materials A. adding impurities
B. reducing temperatures
C. application of magnetic field
D. any of the above
Super conductivity can be destroyed by_____________? Read More »
Electrical Engineering Materials A. Composition
B. Pressure
C. Size
D. Temperature
Which of the following affect greatly the resistivity of electrical conductors ? Read More »
Electrical Engineering Materials A. Tin-lead
B. Tin-silver-lead
C. Copper-zinc
D. None of the above
__________ is a hard solder? Read More »
Electrical Engineering Materials A. linear
B. hexagonal
C. orthorhombic
D. cubic
Most of the common metals have _________ structure? Read More »
Electrical Engineering Materials A. increases
B. decreases
C. does not change
Addition of 0.3 to 4.5% silicon to iron ________ the electrical resistivity of iron? Read More »
Electrical Engineering Materials A. vacuum tubes
B. copper conductors
C. ferrite cores
D. transistors
Thermonic emission occurs in______________? Read More »
Electrical Engineering Materials A. high resistivity
B. high resistance to corrosion
C. good thermal conductivity
D. high melting point
A. Glass
B. Quartz
C. Corrundum
D. Neoprene
_________ is an example of piezoelectric material? Read More »
Electrical Engineering Materials A. resonant waves
B. musical waves
C. microwaves
D. ultrasonic waves
Piezoelectric materials serve as a source of ____________ ? Read More »
Electrical Engineering Materials