Electronics and Communication Engineering - Electromagnetic Field Theory

46.
The duration of sunspot cycle is
1 year
11 years
55 years
100 years
Answer: Option
Explanation:
No answer description is available. Let's discuss.

47.
Electromagnetic cavity resonators (energy storage devices) are used in
wave meters
bandpass filters
high frequency tubes
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.

48.
Waveguides are generally used above
20 MHz
100 MHz
200 MHz
1000 MHz
Answer: Option
Explanation:
No answer description is available. Let's discuss.

49.
Maximum power transfer will take place in a practical antenna if (XL = Load Reactance, XA Antenna Reactance)
XL = - XA
XL = XA
XL = XA
XL = XA2
Answer: Option
Explanation:
No answer description is available. Let's discuss.

50.
Which type of fading causes serious distortion of modulated signal?
Selective fading
Interference fading
Absorption fading
Polarization fading
Answer: Option
Explanation:
No answer description is available. Let's discuss.