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- Question
In an optional fiber the refractive index of cladding material should be
Options- A. nearly 1
- B. very low
- C. less than that of core
- D. more than that of core
- Correct Answer
- less than that of core
- 1. A rectangular waveguide has a discontinuity in the form of reduced narrow dimension. In the equivalent circuit this discontinuity can be represented by
Options- A. a shunt capacitance at the discontinuity
- B. a shunt inductance at the discontinuity
- C. a shunt resistance at the discontinuity
- D. none of the above Discuss
- 2. As compared to their values in free space
Options- A. velocity of electric wave in dielectric is smaller but wave length of electric wave is more
- B. both velocity and wave length of electric wave in dielectric are higher
- C. both velocity and wave length of electric wave in dielectric are smaller
- D. wave length of electric wave is less but velocity is more in dielectric Discuss
- 3. Assertion (A): Inter-digitated geometry is widely used for microwave transistors.
Reason (R): Tuning at input and output of transistor uses MOS chip capacitors.
Options- A. Both A and R are correct and R is correct explanation of A
- B. Both A and R are correct but R is not correct explanation of A
- C. A is correct but R is wrong
- D. A is wrong but R is correct Discuss
- 4. Assertion (A): Slotted line is frequently used for microwave measurements.
Reason (R): The unknown impedance is mounted at the end of slotted line.
Options- A. Both A and R are correct and R is correct explanation of A
- B. Both A and R are correct but R is not correct explanation of A
- C. A is correct but R is wrong
- D. A is wrong but R is correct Discuss
- 5. Depth of penetration does not depend on frequency.
Options- A. True
- B. False Discuss
- 6. What is the numerical aperture an optical fiber when critical angle is 30°?
Options- A. 0.5
- B. 0.704
- C. 0.866
- D. 0.2 Discuss
- 7. If rv is reflection coefficient and VSWR is voltage standing wave ratio, then
Options- A.
- B.
- C.
- D.
Discuss
- 8. A line of characteristic impedance Z0 branches into two line each with characteristic impedance Z0. The refracted voltage is
Options- A. zero
- B. infinite
- C. equal to incident voltage
- D. two third of incident voltage Discuss
- 9. The resistance values of a PIN diode under positive bias and negative bias respectively are about
Options- A. a few ohms and a kilo ohms
- B. about 100 ohms and 1000 ohms
- C. about 0.1 ohm and 100 ohms
- D. about 1000 ohms and 10000 ohms Discuss
- 10. The AM, PM, and TV broadcast frequencies are
Options- A. of the same order as microwave range
- B. much lower than microwave range
- C. much higher than microwave range
- D. either (a) or (c) Discuss
Microwave Communication problems
Search Results
Correct Answer: a shunt capacitance at the discontinuity
Correct Answer: both velocity and wave length of electric wave in dielectric are smaller
Correct Answer: Both A and R are correct but R is not correct explanation of A
Correct Answer: Both A and R are correct but R is not correct explanation of A
Correct Answer: False
Correct Answer: 0.5
Correct Answer:
Correct Answer: two third of incident voltage
Correct Answer: a few ohms and a kilo ohms
Correct Answer: much lower than microwave range
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