Piezoelectricity means the slight change in dimensions of a specimen when an ele

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Question
Piezoelectricity means the slight change in dimensions of a specimen when an electric field is applied.
Options
A. True
B. False

Correct Answer

True

Materials and Components problems

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1. On the basis of the type of chemical bonds, solids may be classified into
Options
A. ionic crystals
B. ionic and valence crystals
C. ionic crystal, valence crystals and metals
D. ionic crystals, valence crystals, metal and vander wall crystals

2. Assertion (A): Electronic polarizability increases as atoms becomes larger.
Reason (R): For rare gas, ?₀(?_r - 1) E = Na_e, where N is number of atoms/m³ and a_e is electronic polarizability of material.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true but R is false
D. A is false but R is true

5. The two conductors of a transmission line carry equal current I in opposite direction. The force on each conductor is
Options
A. proportional to I
B. proportional to I²
C. proportional to distance between the lines
D. proportional to I³

8. A wire is carrying current I. The field intensity H at a distance r from the wire
Options
A. is directed towards wire
B. is directed away from wire
C. is tangential every where to a circle of radius r
D. none of the above

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