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Electronics and Communication Engineering - Exam Questions Papers

Exercise : Exam Questions Papers - Exam Paper 18
46.
Maxwell's equations establish the relationship between , , and at any point in a continuous medium. When we move from one medium to another, then which of the following statement/statements is/are correct?
At the boundary separating the two media, the tangential components of and are continuous.
At the boundary separating the two media, the tangential components of are continuous
If there are surface charges present on the boundary, then normal component of is continuous
If there are no surface charges then normal component of is discontinuous.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
Manganin, an alloy of copper and manganese, is used in
Soldering material
Heating elements
Ballast resistors
Standard resistances
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
If a two-port network is reciprocal as well as symmetrical, which one of the following relationships is correct?
Z12 = Z21 and Z11 = Z22
Y12 - Y21 and Y11 - Y22
AD - BC = 1 and A = D
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
Which of the following antenna is obtained by modifying a waveguide?
Microstrip Antenna
Helical Antenna
Horn Antenna
Dipole Antenna
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
Which one of the following pairs is not correctly matched?
NaCl : Diamagnetic
Gd : Paramagnetic
Ferrite : Ferrimagnetic
Cr2 O3 : Ferromagnetic
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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