Fields in Material Space - Electronic Engineering (MCQ) questions & answers

1)   According to the definition of dielectric strength of dielectric medium, which value of electric field give rise to an occurrence of dielectric breakdown phenomenon?

a. Maximum
b. Minimum
c. Initial
d. Final
Answer  Explanation 

ANSWER: Minimum

Explanation:
No explanation is available for this question!
2)   For an estimated value of polarization (P) = 4 .42 x 10-10 c/m2 and the availability of 4 x 1018 dipoles/m3, what will be the value of average dipole moment for dielectric material?

a. 0.05 x 10-28
b. 1.105 x 10-28
c. 1.205 x 10-28
d. 1.405 x 10-28
Answer  Explanation 

ANSWER: 1.105 x 10-28

Explanation:
No explanation is available for this question!
3)   If the magnitude of E for a dielectric material is 0.12 mV/m along with electric susceptibility of about 4, what would be the magnitude of polarization?

a. 2.20 x 10-15 c/m2
b. 3.89 x 10-15 c/m2
c. 4.24 x 10-15 c/m2
d. 5.64 x 10-15 c/m2
Answer  Explanation 

ANSWER: 4.24 x 10-15 c/m2

Explanation:
No explanation is available for this question!
4)   If the material is isotropic and linear, what would be the direction of electric field intensity and the polarization at each point?

a. Parallel
b. Perpendicular
c. Both a and b
d. None of the above
Answer  Explanation 

ANSWER: Parallel

Explanation:
No explanation is available for this question!
5)   Which consequence/s is/are likely to occur due to polarization?

a. Increase in electric flux density
b. Decrease in electric flux density
c. Stability in electric flux density
d. None of the above
Answer  Explanation 

ANSWER: Increase in electric flux density

Explanation:
No explanation is available for this question!
6)   What is the value of rate of change of charge density for steady state current?

a. 0
b. 0.5
c. 1
d. ∞
Answer  Explanation 

ANSWER: 0

Explanation:
No explanation is available for this question!
7)   Which among the following elements is/are not possessed by steady state current?

a. Source
b. Sink
c. Both a and b
d. None of the above
Answer  Explanation 

ANSWER: Both a and b

Explanation:
No explanation is available for this question!
8)   Rate of decrease in charge for volume 'V' bounded by a surface is equal to ______

a. Incoming current rate
b. Outgoing current rate
c. Stable current rate
d. None of the above
Answer  Explanation 

ANSWER: Outgoing current rate

Explanation:
No explanation is available for this question!
9)   Which law/principle of conservation provides the basis for the continuity equation of current?

a. Mass action
b. Energy
c. Charge
d. Momentum
Answer  Explanation 

ANSWER: Charge

Explanation:
No explanation is available for this question!

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