Description : What does Sending out a pulse of high frequency radio waves?
Last Answer : Need answer
Description : For sending sound waves at large distance, which waves are used? A. Infrared waves B. Radio waves C. Light waves D. X-waves
Last Answer : ANSWER: B
Description : What are palindromes? -Biology
Last Answer : answer:
Description : Which of the following are not regular? (A) Strings of even number of a's. (B) Strings of a's, whose length is a prime number. (C) Set of all palindromes made up of a's and b's. (D) Strings of a's whose length is a ... ) (A), (B) and (C) only (3) (B), (C) and (D) only (4) (B) and (D) only
Last Answer : (B), (C) and (D) only
Description : What type of transmission is radiated from an aircraft’s radio altimeter antenna? A. An amplitude modulated continuous wave B. A pulse position modulated UHF signal C. A differential phase shift keyed UHF signal D. A frequency modulated continuous wave
Last Answer : D. A frequency modulated continuous wave
Description : Which of the following systems is not used in radio detection and ranging? A. Frequency shift B. Frequency modulation C. Pulse radar D. Amplitude modulation
Last Answer : D. Amplitude modulation
Description : Radar transmits short pulses of high frequency called A. Infrared waves B. Radio waves C. Ultraviolet waves D. Sound waves
Description : To measure the speed of an approaching car a police officer shines – (1) light waves on it (2) microwaves on it (3) radio waves on it (4) ultra high frequency waves on it
Last Answer : (3) radio waves on it Explanation: Radar, which stands for radio detection and ranging, is a system that uses reflected radio waves to detect objects and measure their distance and speed. For example, police use radar to calculate the speed of cars.
Description : Geodimeter is based on: (A) Propagation of modulated light waves (B) Propagation of infrared radiation (C) The visible light as carrier with frequency of the order of 5 × 1014 Hz (D) High frequency radio waves
Last Answer : Answer: Option A
Description : To measure the speed of an approaching car a police officer shines (1) light waves on it (2) microwaves on it (3) radio waves on it (4) ultra high frequency waves on it
Last Answer : radio waves on it
Description : The carrier waves used for the radio transmission have frequency upto A. 15 KHz B. 30 KHz C. 90 KHz D. 150 KHz
Description : Which among the following waves is used for communication by artificial satellites? (1) Micro waves (2) Radio waves (3) A. M. (4) Frequency of 1016 series
Last Answer : (1) Micro waves Explanation: For fixed (point-to-point) services, communications satellites provide a microwave radio relay technology complementary to that of communication cables. They are also used ... is extensively used for point-to-point telecommunications (i.e., non broadcast uses).
Description : As compared to sound waves the frequency of radio waves is A. lower B. higher C. equal D. may be higher or lower
Last Answer : higher
Description : Infiber optics, thesignal is_______ waves. A) light B) radio C) infrared D) very low-frequency
Last Answer : light
Description : Which radio frequency bands use the tropospheric scattering principle for propagation of radio waves?
Last Answer : Vhf and above
Description : There is a maximum frequency at which vertically transmitted radio waves can be refracted back to Earth. What is this maximum frequency called?
Last Answer : Critical frequency.
Description : Which wave has the highest frequency? w) microwaves x) infrared waves y) ultraviolet waves z) radio waves
Last Answer : ANSWER: Y -- ULTRAVIOLET WAVES
Description : Which among the following waves is used for communication by artificial satellites ? (1) Micro waves (2) Radio waves (3) A. M. (4) Frequency of 1016 series
Last Answer : Micro waves
Description : The waves used for sending signals to the satellite from ground station are _____. A. Ultraviolet rays B. X-rays C. Sound waves D. Micro waves
Last Answer : ANSWER: D
Description : What is the key aspect(s) of sending effective push notifications? 1. Send with info on all new offers 2. Send with high frequency 3. Send highly personalized messages 4. All of these
Last Answer : Send highly personalized messages
Description : what is the key aspects of sending effective push notifications? A. Send highly personalized messages B. Send with high frequency C. Both A and B D. None of the above
Last Answer : A. Send highly personalized messages
Description : A pulsar is a rapidly spinning neutron star which emits: A. A blinding light when it aligns with the planets B. Radio waves detectable from Earth (Answer) C. A gravitational pull which attracts high energy dust particles D. Enough energy to power itself indefinitely
Last Answer : B. Radio waves detectable from Earth (Answer)
Description : By the transition of inner shell electrons in heavy atoms, high energy photons are emitted which are a) gamma rays b) X-rays c) radio waves d) photon rays
Last Answer : b) X-rays
Description : What is meant by pulse rate or frequency of digital signal ?
Last Answer : The number of vibrations per second in a signal is called Pulse rate .
Description : Changes in GnRH pulse frequency in females is controlled by circulating levels of:
Last Answer : Changes in GnRH pulse frequency in females is controlled by circulating levels of: A. Progesterone ... C. Estrogen and inhibin D. Progesterone only
Description : ECE Board Exam March 1996 The modulation system used for telegraphy is A. frequency-shift keying B. two-tone modulation C. pulse-code modulation D. single-tone modulation
Last Answer : A. frequency-shift keying
Description : Changes in GnRH pulse frequency in females is controlled by circulating levels of (a) progesterone only (b) progesterone and inhibin (c) estrogen and progesterone (d) estrogen and inhibin.
Last Answer : c) estrogen and progesterone
Description : In an astable multivibrator, which components determine the pulse repetition frequency?
Last Answer : RC coupling networks.
Description : What term is used to describe the product of pulse width and pulse-repetition frequency?
Last Answer : Duty cycle.
Description : What is pulse-frequency modulation?
Last Answer : A method of pulse modulation in which a modulating wave is used to frequency modulate a pulse-generating circuit
Description : It indicates what signal frequencies can be propagated through a given distance of fiber cable. ∙ A. Bandwidth Distance Product ∙ B. Pulse width dispersion ∙ C. Rise time ∙ D. Cutoff frequency
Last Answer : A. Bandwidth Distance Product
Description : A back-and-forth pattern of motion that transfers energy A. Wave B. Pulse C. Reflection D. Frequency
Last Answer : D. Frequency
Description : A rate of something that repeats over and over. A. Pulse B. Wave C. Velocity D. Frequency
Last Answer : C. Velocity
Description : An eight stage ripple counter uses a flip-flop with propagation delay of 75 nanoseconds. The pulse width of the strobe is 50ns. The frequency of the input signal which can be used for proper operation of the counter is approximately (A) 1 MHz. (B) 500 MHz. (C) 2 MHz. (D) 4 MHz.
Last Answer : Maximum time taken for all flip-flops to stabilize is 75ns x 8 + 50 = 650ns. Frequency of operation must be less than 1/650ns = 1.5 MHz.
Description : A pulse radar has a pulse repetition frequency (PRF) of 3 KHz. If the radar is emitting at 10 GHz, what is the maximum unambiguous range for this radar? A) 5 Km B) 5 m C) 50 Km D) 15 m
Last Answer : A pulse radar has a pulse repetition frequency (PRF) of 3 KHz. If the radar is emitting at 10 GHz, what is the maximum unambiguous range for this radar? A) 5 Km B) 5 m C) 50 Km D) 15 m
Description : A pulse compression radar transmits an encoded pulse having a frequency chirp from 990 MHz to 1010 MHz centred around 1 GHz. The range resolution capability of this radar is A) 7.5 m B) 7.5 Km C) 75 m D) 750 m
Last Answer : A pulse compression radar transmits an encoded pulse having a frequency chirp from 990 MHz to 1010 MHz centred around 1 GHz. The range resolution capability of this radar is 7.5 m
Description : The clock frequency of an 8085 microprocessor based system is 3 MHz. What should be the minimum pulse width of the INTR signal so that it is recognized successfully? A) 5.6 µs B) 5.7 µs C) 5.8 µs D) 5.9 µs
Last Answer : The clock frequency of an 8085 microprocessor based system is 3 MHz. What should be the minimum pulse width of the INTR signal so that it is recognized successfully? A) 5.6 µs B) 5.7 µs C) 5.8 µs D) 5.9 µs
Description : Pick out the wrong statement (A) The concentric atmosphere layer just above troposphere is called stratosphere, which is rich in ozone (B) Mesosphere is characterised by very low atmospheric ... radio waves used in the long distance radio communication are reflected back to earth by stratosphere
Last Answer : (D) The radio waves used in the long distance radio communication are reflected back to earth by stratosphere
Description : What is the technique of detecting the position of objects by producing very high frequency sound waves and listening to the echos?
Last Answer : ANSWER: SONAR
Description : Which of the following statements is not true with respect to microwaves? (A) Electromagnetic waves with frequencies from 300 GHz to 400 THz. (B) Propagation is line-of-sight. (C) Very ... waves cannot penetrate walls. (D) Use of certain portions of the band requires permission from authorities.
Last Answer : (A) Electromagnetic waves with frequencies from 300 GHz to 400 THz.
Description : Has anyone ever actually picked up radio waves in their mouth?
Last Answer : It happened on Gilligan’s Island once.
Description : The absorption of radio waves by the atmosphere depends on which thing? -General Knowledge
Last Answer : The answer is 'Their frequency'
Description : By which Radio waves of constant amplitude can be generated? -General Knowledge
Last Answer : The answer is 'Oscillator'