B:-(eh)/(8Pi m)* “hatSigma’* *

C:-*(em)/(4(h/(2Pi))* * hatsigma*

D:-* (em)/(2(h/(2Pi))* “hatsigma*

Correct Answer:- Option-A
Question38:-A wave function is said to be symmetric if the interchange of any pair of particles

A:-changes the sign of y

B:-does not change the sign of y

C:-change or does not change y

D:-none of the above is true

Correct Answer:- Option-B
Question39:-The value of [‘L_(x)* , “L_(y)° 115

A:i(h/2n) L
8:-1(೧/27)` (2)
C:-zero

0:11 (2

Correct Answer:- Option-B
Question40:-Find the correct relation
A:-Hy = i(h/2n) *(dPsi)/dx*
B:-HY = i(h/2n) *(dPsi)/dt*
പേട 62/8௫) 05262: 34)ம
D:-Hy =(*p*(2)) ശ്രമ ‏پر(‎
‎Correct Answer:- Option-B

Question41:-If a material has a conductivity of 25 S/m and relative permittivity of 80, then at a frequency of 3 GHz the
material will acts as

A:-insulator
B:-conductor
C:-perfect dielectric
D:-none of the above
Correct Answer:- Option-B
Question42:-For normal incidence at an air glass interface with refractive index of 1.5 the fraction of energy reflected is
given by
A:-0.40
B:-0.2
C:-0.16
D:-0.04
Correct Answer:- Option-D
Question43:-Which of the following current densities J} can generate the magnetic vector potential A=y?i+x?j
A:-2(xit yj)/HO
8:--2(1+ )/10
204/0
0:-20/-///10
Correct Answer:- Option-B

Question44:- Find out the correct relation between magnetic field B and electric field E, if n is the unit vector along the
direction of propagation

A:--B = (nXxE)/c

= c(nxE)
C:-B = c/(nxE)
D:-B = (Exn)/c

Correct Answer:- Option-A
Question45:-Neper/meter is the SI unit of

A:-phase constant

B:-attenuation constant

C:-planck’s constant

D:-skin depth

Correct Answer:- Option-B

Question46:-A system of N non-interacting classical point particles are constrained to move on the two-dimensional surface
of a sphere. The internal energy of the system is

)8( ()-ھ
‎பட்டமா‏
‎1௨௦ ग‏ )5/2(