10 QA on space communication

10 QA on space communication | Learn Physics

10 Question-Answer on space communication

1. In space communication, the sound wave can be sent from one place to another

(a) Through space

(b) Through wires

(d) By superimposing it on damped electromagnetic waves

Ans: (c)

2. In space communication, the information can be passed from one place to another at a distance of 100 km in

(a) 1 sec

(b) 0.5 sec

(d) None of above

Ans: ( d)

3. The ground wave propagation is suitable for radio waves of frequency

(a) Upto 2 MHz

(b) From 2 MHz to 20 MHz

(d) None of above

Ans: (a)

4. The electromagnetic waves of frequency range 100 to 300 GHz are used in

(a) Sky wave propagation

(b) T.V. communication

(d) Ground wave communication

Ans: (c)

5. The space wave propagation is utilized in

(a) Only television communication

(b) Only radar communication

(d) All of them

Ans: (d)

6. Fading is the variation in the strength of a signal as a receiver due to

(a) Interference of waves

(b) Diffraction of waves

(d) None of the above

Ans: (a)

7. Space wave propagation is

(a) Tropospherical propagation

(b) Sky wave propagation

(d) None of the above

Ans: (a,c)

8. Which of the following is better propagation mode to propagate television frequency modulation and radar signals

(a) Satellite communication

(b) Ground propagation

(d) None of the above

Ans: ( a)

9. The wavelength of an electromagnetic wave on a wave guide

(a) Is directly proportional to the group velocity

(b) Is inversely proportional to the phase velocity

(d) Is greater than in free space

Ans: ( d)

10. In ultra high frequency range the frequencies are propagated by means of

(a) Surface waves

(b) Sky waves

(d) Ground waves

Ans: (c)

Comments

Biography of Manohar Joshi

Biography of Manohar Joshi: Manohar Gajanan Joshi is an Indian politician who has played a significant role in Maharashtra state politics. Born on December 2, 1937, in a middle-class family in a village called Ganeshpeth in Ratnagiri district, Maharashtra, Joshi's journey into politics was marked by his association with the Shiv Sena, a right-wing regional political party in India. Joshi's political career began in the late 1960s when he joined the Shiv Sena, which was then led by its founder, Bal Thackeray. He quickly rose through the ranks of the party due to his organizational skills, dedication, and ideological alignment with the party's principles, which advocated for the interests of the Marathi-speaking population of Maharashtra. In 1972, Manohar Joshi won his first election to the Brihanmumbai Municipal Corporation (BMC), marking the beginning of his electoral career. He served as a corporator in the BMC and later became the Mayor of Mumbai in 1976. Joshi's tenu...

Professor Cheiro Prophecies about India | 5 predictions Professor Kiro - Kiro made these amazing predictions for India

Professor Cheiro Prophecies: Here is Kiro made these amazing predictions for India: Professor Kiro was born in November 1866 in England. At the age of 17, Kiro came to Mumbai and met astrologer Vednarayan Joshi. With his advice, he will reach the Himalayas, Kashmir, Ladakh and Varanasi. From here, he studied astrology extensively. Kiro made many predictions in his life, which we are giving you here. Cheiro, whose real name was William John Warner, was a prominent Irish astrologer and palmist who gained fame in the late 19th and early 20th centuries. He was known for his accurate predictions and was consulted by various prominent figures of his time, including Mark Twain, Oscar Wilde, and Thomas Edison. Cheiro also made some predictions related to India. Parada Kahanee One of his notable predictions about India was made in his book "Cheiro's World Predictions," published in 1926. In this book, he wrote about the possibility of India gaining independence from British...

Biography of Abbie Hoffman | Early Life and Political Activism - Later Years and Personal Life - Legacy of Abbie Hoffman

Biography of Abbie Hoffman: Abbie Hoffman (November 30, 1936 – April 12, 1989) was an American political and social activist known for his involvement in the counterculture and anti-war movements of the 1960s and 1970s. He was a key figure in the Youth International Party (Yippies) and was known for his theatrical and often humorous protests. Here is a brief biography of Abbie Hoffman: Early Life of Abbie Hoffman: 1. Birth: Abbie Hoffman was born on November 30, 1936, in Worcester, Massachusetts, USA. 2. Education: He attended Brandeis University, where he earned a degree in psychology in 1959. Parada Kahanee Political Activism: 1. Civil Rights Movement: Hoffman began his activism by participating in the civil rights movement during the early 1960s. 2. Youth International Party (Yippies): In 1967, Hoffman, along with Jerry Rubin and others, co-founded the Yippies, a countercultural and anti-authoritarian political party known for its unconventional and theatrical protes...

Biography, Science, Technology, Health, History Blogs

Search This Blog