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Electrical Materials

Electrical Materials
Question:-
Option (A)
large saturation magnetization
Option (B)
High curie temperature
Option (C)
high melting point
Option (D)
Large diamagnetic susceptibility
Correct Option:
A
Question:-
Option (A)
1.171 GPa
Option (B)
1.182 GPa
Option (C)
2.6 GPa
Option (D)
2.55 GPa
Correct Option:
C
Question Solution:
Uniaxial stress (p) = Y.(ÑC/C)
Q = CV Þ polarization P =(q/A)=(C/A).V
Where A is area of the crystal capacitor
\ Ñp = (V/A). ÑC
Þ (ÑP/P)=(ÑC/C)
Þ stress (P)
= Y.(ÎP/P) = 130 x (10/500) = 2.6 GPa
Question:-
Option (A)
9
Option (B)
3
Option (C)
1/3
Option (D)
1/9
Correct Option:
B
Question Solution:
WE = (1/2) CV2 = (1/2) ∫ Î0ÎrE2dv Þ WE a Îr
Question:-
Option (A)
Normal state
Option (B)
Unstable state
Option (C)
Temperature-independent state
Option (D)
Temperature-dependent state
Correct Option:
A
Question Solution:
The transition temperature of a superconductor can be reduced by the application of a magnetic field. Suppose a superconductor has a temperature T< Tc. If a magnetic field H is applied, the material remains superconducting until a critical field Hc is reached such that for H > Hc, the material is in the normal state
Question:-
Option (A)
Increases
Option (B)
Decreases
Option (C)
Remains same
Option (D)
Fluctuates
Correct Option:
C
Question Solution:
Electronic and ionic polarizability remain constant with increase in temperature but orientational polarization is inversely proportional to the temperature
Question:-
Option (A)
5 mm
Option (B)
10 mm
Option (C)
20 mm
Option (D)
40 mm
Correct Option:
C
Question Solution:
l a(1/Energy of the electron); slow moving electron has energy