Question is ⇒ A 10 GHz signal propagates in a waveguide with a phase velocity of 4 x 10<sup>8</sup> m/s. If the signal produces standing wave in the guide, then the distance between successive minimal will be, Options are ⇒ (A) 10 mm, (B) 20 mm, (C) 30 mm, (D) 40 mm, (E) , Leave your comments or Download question paper.

Question is ⇒ A 10 GHz signal propagates in a waveguide with a phase velocity of 4 x 10<sup>8</sup> m/s. If the signal produces standing wave in the guide, then the distance between successive minimal will be, Options are ⇒ (A) 10 mm, (B) 20 mm, (C) 30 mm, (D) 40 mm, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	A 10 GHz signal propagates in a waveguide with a phase velocity of 4 x 10⁸ m/s. If the signal produces standing wave in the guide, then the distance between successive minimal will be
A.	10 mm [Wrong Answer]
B.	20 mm [Correct Answer]
C.	30 mm [Wrong Answer]
D.	40 mm [Wrong Answer]
View Answer 1 -1 Explanation:- Answer : B 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 :

⇒ For the BJT shown in figure, β = 50, the value of V_CE
3.13 V
4.24 V
5.18 V
none

⇒ A junction Field Effect Transistor can operate in
depletion mode only
enhancement mode only
depletion and enhancement modes
neither depletion nor enhancement modes

⇒ One commercial unit of energy is equal to
1 watt-sec
1 kilowatt-sec
1 kilowatt-hour
One watt-hour

⇒ At absolute temperature
the forbidden energy gap in germanium is higher than that in silicon
the forbidden energy gap in germanium and silicon are equal
the forbidden energy gap in silicon is higher than that in germanium
none of the above

⇒ A counter has a modulus of 10. The number of flip flops is
10
5
4
3

⇒ The divergence of a vector is a scalar, while the curl of a vector is another
scalar
vector
unit vector
none of the above

⇒ A 4 bit down counter starts counting from 1111 irrespective of modulus.
TRUE
FALSE

⇒ When negative feedback is used the fractional changes in closed loop gain are desensitized by the factor (1 + A_vβ)
TRUE
FALSE

⇒ In a transistor, current I_CBO flow when
some D.C. voltage is applied in the reverse direction to the emitter junction with the collector open circuit
some D.C. voltage is applied in the forward direction to the collector junction with the emitter open circuit
some D.C. voltage is applied in the reverse direction to the collector junction with the emitter open circuited
some D.C. voltage is applied in the forward direction to the emitter junction with the collector open circuited

⇒ Which of the following subtraction operations do not result in F₁₆?

(BA)₁₆ - (AB)_{161 and 2
1 and 3
2 and 3
1, 2 and 3}

⇒ VSWR can have any value between
0 and 1
- 1 to + 1
0 to ∞
1 to ∞

⇒ A 1000 kHz carrier wave modulated 40% at 40000 Hz is applied to a resonant circuit tuned to a carrier frequency and having Q = 140. What is the degree of modulator after transmission through the circuit?
0.4
0.2
0.27
0.54

⇒ In a centre tap full wave rectifier, 50 V is the peak voltage between the centre tap and one of the ends of the secondary. The maximum voltage across the reverse biased diode will be
100 V
72 V
50 V
38 V

⇒ For a binary half subtractor having two inputs A and B the correct sets of logical expressions for the outputs D (A - B) and X = Borrow are
D = AB + AB, X = AB
D = AB AB, X = AB
D = AB + AB, X = AB
D = AB + A B, X = AB

⇒ A silicon PN junction diode under reverse bias has depletion region of width 10 μm. The relative permittivity of silicon, ε_r = 11.7 and the permittivity of free space ε₀ = 8.85 x 10^-12 F/m. The depletion capacitance of the diode per square meter is
100 μF
10 μF
1 μF
20 μF

⇒ For an unstable system the gain margin is indicative of how much the gain should be decreased to make the system stable.
TRUE
FALSE

⇒ To measure dielectric loss you would use
Anderson bridge
Kelvin bridge
Schering bridge
Maxwell's bridge

⇒ As the number of flip flops are increased, the total propagation delay of
ripple counter increases but that of synchronous counter remains the same
both ripple and synchronous counters increase
both ripple and synchronous counters remain the same
ripple counter remains the same but that of synchronous counter increases

⇒ When a wave is incident from the more dense into a less dense medium at an angle equal to or exceeding the critical angle, the wave suffers total internal __________ .
reflection
refraction
transmission
none of the above
⇒ Consider the following features of an instrument
1. suitable for both ac and dc
2. free from hysteresis and eddy current errors
3. No waveform and frequency errors
4. it is essentially a voltmeter
This instrument is
moving iron
moving coil
electrostatic
dynamometer
⇒ As regards dielectric constant ε_r
the units are farads/m
the units are newton/coulomb
it is dimensionless
the units are farads

⇒ The semiconductor diode which can be used in switching circuit in microwave range is
PIN diode
Varactor diode
Tunnel diode
Gunn diode

⇒ In the circuit of figure, the value of r_e is (neglecting v_{be100 Ω
75 Ω
50 Ω
25 Ω}

⇒
Assertion (A): CMOS devices have very low power consumption
Reason (R): CMOS devices have high noise margin.

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 true, R is false
A is false, R is true
⇒ Consider the following statements about a good power supply:
1. The a.c. ripple should be high
2. S_v, (Voltage stability factor) should be low
3. S_T, (Temperature stability factor) should be low
Which of the above statements are correct?
1, 2 and 3
2 only
3 only
2 and 3 only
⇒ When two conductors carry currents in the same direction the force is repulsive.
TRUE
FALSE

⇒
Assertion (A): The exponential form of Fourierserie
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 true, R is false
A is false, R is true

⇒ In the analysis of common emitter amplifier we may neglect
h_re
h_oe
h_fe
h_ie

⇒ In a sine wave, maximum rate of change of voltage occurs at
ascent of the waveform
+ ve maximum
- ve maximum
between maximum and minimum

⇒ A network contains only independent current source and resistors. If the values of all resistors are doubled, the value of the node voltage
will become half
will remain unchange
will become one third
cannot be determined unless the circuit configuration and the values of the resistors are known