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- Question
Compared to coaxial lines, the advantages of wave guides are
Options- A. higher power handling capacity
- B. lower loss per unit length
- C. cheaper and simple mechanical structure
- D. all of the above
- Correct Answer
- all of the above
- 1. In a power diode the reverse recovery time is the time from the instant the forward current is zero to the instant when reverse recovery current has decayed to
Options- A. 50% of peak reverse current
- B. 25% of peak reverse current
- C. 10% of peak reverse current
- D. zero value Discuss
- 2. In a rectangular waveguide
Options- A. the broad width is generally labelled 'a' and height 'b'
- B. the broad width is generally labelled 'b' and height 'a'
- C. any one of the dimensions may be labelled 'a' and the other 'b'
- D. the length is labelled as 'a' Discuss
- 3. Match the following:
List I List II A. shift Register 1. Frequency division B. Counter 2. Addressing in memory chips C. Decoder 3. Serial to parallel Data conversion
Options- A. A-3, B-2, C-1
- B. A-3, B-1, C-2
- C. A-2, B-1, C-3
- D. A-1, B-2, C-2 Discuss
- 4. A silicon (PN) junction at a temperature of 20°C has a reverse saturation current of 10 pico Ampere. The reverse saturation current at 40°C for the same bias is approximately.
Options- A. 30 pA
- B. 40 pA
- C. 50 pA
- D. 60 pA Discuss
- 5. Match the following:
List I (Operator) List II (Description) A. ? : 1. Modulus B. [ ] 2. Array expression C. % 3. Conditional
Options- A. A-3, B-2, C-1
- B. A-1, B-2, C-3
- C. A-1, B-3, C-2
- D. A-2, B-3, C-1 Discuss
- 6. The driving-point impedance Z(s) of a network has a pole-zero locations as shown in the figure. If Z(0) = 3, then Z (s) is
Options- A.
- B.
- C.
- D.
Discuss
- 7. 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
- 8. A 3 phase semiconverter when supplying a certain load has a rectification efficiency of 0.6 and transformer utilisation factor of 0.35. When a 3 phase full converter is supplying the same load
Options- A. rectification efficiency will be more than 0.6 and TUF will be more than 0.35
- B. rectification efficiency will be more than 0.6 but TUF will be less than 0.35
- C. rectification efficiency will be less than 0.6 and TUF will be less than 0.35
- D. rectification efficiency will be less than 0.6 but TUF will be more than 0.35 Discuss
- 9. The access time of a word in 4 MB main memory is 100 ms. The access time of a word in a 32 kb data cache memory is 10 ns. The average data cache bit ratio is 0.95. The efficiency of memory access time is
Options- A. 9.5 ns
- B. 14.5 ns
- C. 20 ns
- D. 95 ns Discuss
- 10. Match the following:
List I (Operator) List II (Description) A. ! = 1. Left shift B. = = 2. Right Shift C. < < 3. Equal to D. > > 4. Not equal to
Options- A. A-1, B-2, C-3, D-4
- B. A-2, B-3, C-4, D-1
- C. A-4, B-1, C-3, D-2
- D. A-4, B-3, C-1, D-2 Discuss
More questions
Correct Answer: 50% of peak reverse current
Correct Answer: the broad width is generally labelled 'a' and height 'b'
Correct Answer: A-3, B-1, C-2
Correct Answer: 40 pA
Explanation:
By increasing of temperature by 10°C, Io become double so by increasing temperature 20°C, Io become 4 time than initial value... and it is 40 PA.
Correct Answer: A-3, B-2, C-1
Correct Answer:
Explanation:
From figure, The impedance function
and Z(0) = 
while in question Z(0) = 3
⟹ = 3 ⟹ k = 2.
Correct Answer: a shunt capacitance at the discontinuity
Correct Answer: rectification efficiency will be more than 0.6 and TUF will be more than 0.35
Correct Answer: 14.5 ns
Explanation:
Access time = 0.95 x 10 + 0.05 x 100.
Correct Answer: A-4, B-3, C-1, D-2
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