Question is ⇒ Wave guides are pressurised above normal atmospheric pressure for, Options are ⇒ (A) increasing the power handling capacity, (B) improving conductivity of walls, (C) preventing higher modes from propagation, (D) varying the wave impedance, (E) , Leave your comments or Download question paper.

Question is ⇒ Wave guides are pressurised above normal atmospheric pressure for, Options are ⇒ (A) increasing the power handling capacity, (B) improving conductivity of walls, (C) preventing higher modes from propagation, (D) varying the wave impedance, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	Wave guides are pressurised above normal atmospheric pressure for
A.	increasing the power handling capacity [Correct Answer]
B.	improving conductivity of walls [Wrong Answer]
C.	preventing higher modes from propagation [Wrong Answer]
D.	varying the wave impedance [Wrong Answer]
View Answer 2 -2 Explanation:- Answer : A Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

Previous question Next question

Also Read Similar Questions Below :

⇒ Holes act like
positive charges
neutral atoms
negative charges
crystals

⇒ As frequency is increased, the skin effect
increases
decreases
remains the same
either (b) or (c)

⇒

Assertion (A): Chopper always requires forced commutation

Reason (R): Morgan chopper uses a saturable reactor.

Both A and R are correct and R is correct explanation of A
Both A and R correct but R is not correct explanation of A
A is correct but R is wrong
A is wrong but R is correct

⇒ Current chopping leads to
over voltage
over current
both over voltage and over current
either over voltage or over current

⇒ A Karnaugh map with 4 variables has
2 cells
4 cells
8 cells
16 cells

⇒ In figure, V_C is approximately equa
2 V
4.6 V
8 V
7.6 V

⇒ Feedback factor may be less or more than 1.
TRUE
FALSE

⇒ In the amplifier circuit of figure h_fe = 100 and h_ie = 1000 Ω. The voltage gain of amplifier is a
0.33
0.5
0.66
1

⇒ For VLF antennas radiation resistance is usually of the order of
less than one ohm
13 to 20 ohms
around 100 ohms
more than 200 ohms

⇒ In an intrinsic semiconductor, the intrinsic charge concentration at any absolute temperature T is proportional to
T
T²
T³
T⁴

⇒

Assertion (A): Microprocesspr 8085 has six 8 bit registers B, C, D, E, H L.

Reason (R): B - C, D - E, H - L may be combined to form register pairs to hold 16 bits data.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is correct R is wrong
A is wrong R is correct

⇒ A high level language is less efficient than machine language.
TRUE
FALSE

⇒ If two network is connected in series-parallel connection then
h = [h_a] + [h_b]
[a_a] + [b_b]
[Z] = [Z_a] - [Z_b]
none

⇒ Consider the following

Generation of SSB signals
Design of minimum phase type filters
Representation of band pass signals

Which of the above applications is Hilbert transform used?
1 only
1, 2 and 3
1, 2 only
1 and 3

⇒ Maximum power from a source having internal resistance R_i is delivered to a resistive load R_L, if
R_i > R_L
R_i < R_L
R_i = R_L²
R_i = R_L

⇒ The scale of dynamometer wattmeter is non linear.
TRUE
FALSE

⇒ A half wave diode rectifier and full wave diode bridge rectifier both have an input frequency of 50 Hz. The frequencies of outputs respectively are
100 Hz and 50 Hz
50 Hz and 100 Hz
100 Hz each
50 Hz each

⇒ In 8085 microprocessor, in order to enable INTR interrupt, which of the following instruction are needed?
EI only
SIM only
El and SIM both
None

⇒ A complementary symmetry amplifier has
1 P-N-P and 1 N-P-N transistor
2 P-N-P transistor
2 N-P-N transistor
2 P-channel FETs

⇒ For the circuit shown in the figure, the capacitor C is initially uncharged. At t = 0, the switch S is closed. The voltage V_c across the capacitor at t = 1 millisecond is (In the figure shown above, the op-amp is supplied with ± 15 V and the ground has been shown by the sym
0 V
6.3 V
9.45 volts
10 volts

⇒ The process of deliberately adding impurity to a semi-conductor material is called
impurification
pollution
deionisation
doping

⇒ Natural commutation can be used in :
DC circuits only
AC circuits only
both AC and DC circuits
none of the above

⇒

Assertion (A): CO₂ has no resultant dipole moment but CO has a dipole moment.

Reason (R): The structure of CO₂ is O = C = O.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true but R is false
A is false but R is true

⇒ The Boolean function A + BC is a reduced form of
AB + BC
(A + B) . (A + C)
AB + ABC
(A + C) . B

⇒ What is the gray code word for EX-OR the binary number 101011?
101011
110101
111110
11111

⇒ A (75 - J50) ohm load is connected to a coaxial of Z₀ = 75 ohm at 10 GHz. The best method of matching is to connect
an inductance at load
a short circuited stub at load
a short circuited stub at specific distance from load
a capacitance at specific distance from load

⇒ Find the number of loop equation and number of possible trees for the given gr
7, 2097152
7, 262144
7.5764801
6, 823543

⇒ Consider the amplitude modulated (AM) signal A_c cos ω_ct + 2 cos ω_mt cos ω_ct For demodulating the signal using envelope detector, the minimum value of A_c should be
2
1
0.5
0

⇒ In drawing phasor diagram
rms values are used
peak values are used
either rms or peak values are used
either rms or peak or averages values are used

⇒ Convolution of x(t + 5) with impulse function δ(t - 7) is equal to
x(t - 2)
x(t + 12)
x(t - 12)
(t + 2)