# Measurement of the dielectric constant and loss tangent of materials in microwave frequency band using a rectangular waveguide cavity.

## Quiz

This includes two sections: Quiz (Pre) and Quiz (Post).
Quiz (Pre) is based on the theory of the experiment, student should have this much knowledge before performing the experiment and Quiz (Post) is based on the exe file, this will help the user to check the level of his understanding.

Section 1 : Quiz (Pre)

Q1.A cavity resonator can be represented by

LC circuit
LCR circuit
LR circuit
CR circuit

Q2.TM and TE modes in rectangular cavity resonator

does not exist
exist but not unique
depends on the dimension
none of these

Q3.In a rectangular cavity resonator, TMmnp and TEmnp modes are always degenrate if

p=0 and m, n are non zero
none of the indices is zero
any one of the indices is zero
none of these

Q4.In an air filled rectangular cavity resonator, dominant mode for a > d > b where a, b ,d are thedimensions in the x-, y-, and z-directons, respectively.

TE110
TE111
TE101
none of these

Q5.What should be the size of a hollow cubic cavity in order to have a dominant resonant frequency of 10 GHz ?

2.12×10-2
3×10-2
2.12×10-3
none of these

Q6.If loss tangent of dielectric is 0.0004, then quality factor of dielectric (Qd) is

1500
2100
1767
2500

Q7.The rectangular cavity resonator is a waveguide version of

short-circuited λ/4 transmission line resonator
short-circuited λ/2 transmission line resonator
open-circuited λ/4 transmission line resonator
open-circuited λ/2 transmission line resonator

Q8.An air filled, brass-plated rectangular waveguide cavity has dimensions a=4 cm, b=2 cm, d=5 cm. Find the resonant frequency of the TE102 mode?

4.8 GHz
15 GHz
7.07 GHz
none of these

Q9.In a rectangular cavity resonator, if b < a < d, where a, b ,d are thedimensions in the x-, y-, and z-directons, respectively. The dominant TM mode is

TM100
TM111
TM110
TM101

Q10.In lossless rectangular cavity resonator, the time average Poynting vector and time-average power transmitted

both are zero in any direction
both are non zero in the direction of wave propagation
time average power flow is in the direction of wave propagation
none of these