TasDia Network
TasDia Network

MCQs 1: Piezoelectric materials serve as a source of ____________ ?

resonant waves musical waves microwaves ultrasonic waves
Answer Explanation

MCQs 2: _________ is an example of piezoelectric material?

Glass Quartz Corrundum Neoprene
Answer Explanation

MCQs 3: A good electric contact material should have all of the following properties except_____________?

high resistivity high resistance to corrosion good thermal conductivity high melting point
Answer Explanation

MCQs 4: Thermonic emission occurs in______________?

vacuum tubes copper conductors ferrite cores transistors
Answer Explanation

MCQs 5: Addition of 0.3 to 4.5% silicon to iron ________ the electrical resistivity of iron?

increases decreases does not change
Answer Explanation

MCQs 6: Most of the common metals have _________ structure?

linear hexagonal orthorhombic cubic
Answer Explanation

MCQs 7: __________ is a hard solder?

Tin-lead Tin-silver-lead Copper-zinc None of the above
Answer Explanation

MCQs 8: Which of the following affect greatly the resistivity of electrical conductors ?

Composition Pressure Size Temperature
Answer Explanation

MCQs 9: Super conductivity can be destroyed by_____________?

adding impurities reducing temperatures application of magnetic field any of the above
Answer Explanation

MCQs 10: Which of the following materials does not have covalent bonds ?

Organic polymers Silicon Metals
Answer Explanation

MCQs 11: Non-linear resistors______________?

produce harmonic distortion follows Ohm’s law at low temperatures only result in non-uniform heating none of the above
Answer Explanation

MCQs 12: In graphite, bonding is____________?

covalent metallic Vander Waals Vander Waals and covalent
Answer Explanation

MCQs 13: A carbon resistor contains_____________?

carbon crystals solid carbon granules pulverized coal finely divided carbon black
Answer Explanation

MCQs 14: Total number of crystal systems is____________?

2 4 7 12
Answer Explanation

MCQs 15: The resistivity of a metal is a function of temperature because_____________?

the amplitude of vibration of the atoms varies with temperature the electron density varies with temperature the electron gas density varies with temperature
Answer Explanation

MCQs 16: Due to which of the following reasons aluminium does not corrode in atmosphere ?

Aluminium is a noble metal Atmospheric oxygen can only diffuse very slowly through the oxide layer which is formed on the surface of aluminium No reaction with oxygen occurs ft Any of the above
Answer Explanation

MCQs 17: The conductivity of a metal is determined by____________?

the electronic concentration and the mobility of the free electrons the number of valence electrons per atom either (A) or (B) none of the above
Answer Explanation

MCQs 18: In a crystal, an atom vibrates at a frequency determined by_______________?

the heat content of the crystal the temperature of the crystal the stiffness of the bonds it makes with neighbors
Answer Explanation

MCQs 19: The number of atoms per unit cell in B.C.C. structure is_____________?

1 2 4 8
Answer Explanation

MCQs 20: Which of the following material is not a semiconductor ?

Silica Germanium Selenium Gallium-arsenide
Answer Explanation

Related Topics

About Us | Contact Us | Privacy Policy
ABOUT US
Category
Who We Are

TasDia Network, this platform not only provides you the best educational stuff but besides this, we are creating thousands of new ideas to making your signature and planning much more on a single platform.

© 2020-2023, TasDia Network

All rights of the publication are reserved by tasdia.com.