Q. Ball bearings are used to convert static friction into -
1) drag
2) sliding friction
3) rolling friction
4) None of the above
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. Which of the following statements is/are correct about 'quasicrystal'?
1. In a 'quasicrystal' atoms are arranged in a repeating pattern.
2. 'Quasicrystals' are used in manufacturing non-stick frying pans, needles for acupuncture and surgery, dental instruments, and razor blades.
1) Only 1 is correct
2) Only 2 is correct
3) Both 1 and 2 are correct
4) Neither 1 nor 2 is correct
Q. When will a magnet lose its magnetism?
1) If it is cooled very much, say below absolute zero
2) If it is placed without the keepers
3) If it is heated strongly or hammered strongly
4) Once a magnet always a magnet
Q. Energy conversions taking place in a microphone are -
1) Sound to mechanical to electrical
2) Electrical to mechanical to sound
3) Sound to mechanical
4) Mechanical to sound
Q. E. M. F. of a cell is a -
1) Vector quantity
2) Scalar quantity
3) Unit of measurement
4) None of the above
Q. Short circuit means -
1) Direct flow of current between two points of different potential
2) The indirect flow of current between two points
3) Direct flow of current between points of the same potential
4) None of the above
Q. An Electron volt is a unit of -
1) Charge
2) Momentum
3) Energy
4) Potential difference
Interior design is a fun and creative field. It mixes art and practicality to make spaces look good and work well. With more people wanting great places to live and work, the need for skilled interior designers is rising. Let’s look at what it takes to have a career in interior design, including nee →
Foundation Date: December 8, 1991 Headquarters: The Republic of Belarus Executive Secretaries: Sergei Lebedev Member Countries: 12 Commonwealth of Independent States (CIS) was established on December 8, 1991, and the leaders of the Republic of Belarus, the Russian Federation, and Ukraine signed an a →
In 2009, an unknown programmer by the name of Satoshi Nakamoto put forward a whitepaper that proposed a creation of new form of digital currency - cryptocurrency. Cryptocurrency functions the same way as regular currencies do in that its used as a means of exchange, unit of account and a store of va →
Headquarter: New Delhi Function and Objective of the Organization: The Food Safety and Standards Authority of India (FSSAI)has been established under Food Safety and Standards Act, 2006 which consolidates various acts & orders that have hitherto handled food-related issues in various Ministries →
If you contribute your content to our site. Please mail us your content to editor@onlinegk.net