Q. Which of the following photoelectric devices is most suitable for digital applications?
1) Photovoltaic cell
2) Photoemitter
3) Photodiode
4) None of the above
Q. The shrillness of sound is determined by -
1) amplitude of sound
2) wavelength of sound
3) velocity of sound
4) None of the above
Q. A large number of thin strips of black paint are made on the surface of a convex lens of focal length 20 cm to catch the image of a white horse. The image will be -
1) a zebra of black stripes
2) a horse with black stripes
3) a horse of less brightness
4) None of the above
Q. Phalgu, a sacred river flowing in Bihar, is formed by the confluence of which of the following rivers?
1) Lilajan and Son rivers
2) Son and Mohana rivers
3) Mohana and Lilajan rivers
4) None of the above
Q. The atmosphere is mainly heated by the -
1) short-wave solar radiation
2) reflected solar radiation
3) long-wave terrestrial radiation
4) None of the above
Q. Towards the end of summer, there are pre-monsoon showers which are a common phenomenon in Kerala and coastal areas of Karnataka. Locally, they are known as -
1) Blossom showers
2) Norwesters
3) Mango showers
4) None of the above
Q. Which of the following river valleys is rich in coal reserves in India
1) Damodar River Valley
2) Son River Valley
3) Mahanadi River Valley
4) None of the above
Q. India's territorial limit extends towards the sea up to how many nautical miles/km from the coast?
1) 16 nautical miles (about 25-9 km)
2) 12 nautical miles (about 21-9 km)
3) 10 nautical miles (about 19-9 km)
4) None of the above
Q. In which type of climatic region do Uttar Pradesh and Bihar fall as per Koppen's classification scheme?
1) Cwg
2) Aw
3) Dfc
4) None of the above
Q. Which one of the following is the world's richest region from a marine biodiversity perspective, comprising 21 islands with estuaries, beaches, forests of the nearshore environment, seagrasses, coral reefs, salt marshes, and mangroves?
1) Gulf of Mannar Biosphere Reserve
2) Nanda Devi Biosphere Reserve
3) Sunderbans Biosphere Reserve
4) None of the above
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