EC Engineering Materials and Components Online Test Series
Electronics and Communication Engineering Materials and Components Online Test
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Electronics and Communication Engineering Materials and Components Online Test. Electronics and Communication Engineering Question and Answers in English. The Electronics and Communication Engineering Full online mock test paper is free for all students and Very Helpful for Exam Preparation. Electronics and Communication Engineering Online Mock test for Electronics and Communication Engineering Materials and Components Topic. Here we are providing Electronics and Communication Engineering Materials and Components Online Test Series in English. Check Electronics and Communication Engineering Mock Test Series 2019.
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- Question 1 of 30
Diamond is a paramagnetic material.CorrectIncorrect
- Question 2 of 30
Which capacitor-store higher amount of energy?CorrectIncorrect
- Question 3 of 30
Above ferroelectric curie temperature, spontaneous polarization in ferroelectric materials becomes stronger.CorrectIncorrect
- Question 4 of 30
In paramagnetic materialsCorrectIncorrect
- Question 5 of 30
The core of a coil has a length of 10 cm. The self inductance is 8 mH. If the core length is doubled, all other quantities remaining the same, the self inductance will beCorrectIncorrect
- Question 6 of 30
Assertion (A): Electronic and Ionic polarization in a polyatomic gas are independent of temperature.
Reason (R): The orientation polarization is independent of temperature.CorrectIncorrect
- Question 7 of 30
Two materials having temperature coefficients of 0.004 and 0.0004 respectively are joined in series. The overall temperature coefficient is likely to beCorrectIncorrect
- Question 8 of 30
The number of valence electrons in pentavalent impurity isCorrectIncorrect
- Question 9 of 30
If the diameter of a wire is doubled, its current carrying capacity becomesCorrectIncorrect
- Question 10 of 30
The law J = σE, where J is current density, σ is electrical conductivity and E is field strength isCorrectIncorrect
- Question 11 of 30
Assertion (A): Silicon is less sensitive to changes in temperature than germanium.
Reason (R): Cut in voltage in silicon is less than that in germanium.CorrectIncorrect
- Question 12 of 30
Material which lack permanent magnetic dipoles are known asCorrectIncorrect
- Question 13 of 30
A parallel plate capacitor has its length, width and separation doubled. It fringing effects are neglected, to keep the capacitance same, the dielectric constant must beCorrectIncorrect
- Question 14 of 30
In atomic physics, a state with l = 0 is called p state.CorrectIncorrect
- Question 15 of 30
If a sample of germanium and a sample of silicon have the same impurity density and are kept at room temperatureCorrectIncorrect
- Question 16 of 30
Which element exhibits the property of inertia?CorrectIncorrect
- Question 17 of 30
For a permanent magnetic materialCorrectIncorrect
- Question 18 of 30
In a coaxial cable, braided copper is used forCorrectIncorrect
- Question 19 of 30
The hysteresis phenomenon in ferromagnetic materials exists at all temperatures.CorrectIncorrect
- Question 20 of 30
Assertion (A): Magnetic susceptibility of diamagnetic materials is much less than that of paramagnetic materials.
Reason (R): For diamagnetic as well as paramagnetic materials, μr is nearly equal to 1.CorrectIncorrect
- Question 21 of 30
The attraction between the nucleus and valence electron of copper atom isCorrectIncorrect
- Question 22 of 30
If the temperature of an extrinsic semiconductor is increased so that the intrinsic carrier concentration is doubled, thenCorrectIncorrect
- Question 23 of 30
There is no hysteresis phenomenon is any dielectric material.CorrectIncorrect
- Question 24 of 30
In metals the valence electron wave functions are strongly perturbed by the presence of neighbouring atoms.CorrectIncorrect
- Question 25 of 30
For a paramagnetic material, susceptiblity increases with increasing temperature.CorrectIncorrect
- Question 26 of 30
Hydrogen is used inCorrectIncorrect
- Question 27 of 30
At room temperature, the current in intrinsic semiconductor is due toCorrectIncorrect
- Question 28 of 30
If n denotes principal quantum number, the angular quantum number l = 0, 1… (n – 1).CorrectIncorrect
- Question 29 of 30
If a piece of wood is placed in a magnetic fieldCorrectIncorrect
- Question 30 of 30
The number of valence electrons in donor impurity areCorrectIncorrect