11. Radar :
(a) detects only stationary objects
(b) detects only moving targets
(c) detects only incoming targets
(d) detects only stationary and moving targets
12. Radar S-band is :
(a) 4 GHz – 8 GHz
(b) 2 GHz – 4 GHz
(c) 8 GHz – 12 GHz
(d) 12 GHz – 18 GHz
13. The unit of Doppler shift is :
(a) hz
(b) meter
(c) degree
(d) second
14. PRF is :
(a) 1/PI
(b) 1/PRT
(c) PW
(d) PW+PRT
15. Echo is :
(a) transmitted signal
(b) modulated signal
(c) demodulated signal
(d) reflected signal
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