Q. Which of the following is used in fire alarm?
1) Photo cell
2) Water
3) Solar cell
4) None of the above
Q. A 100 W electric bulb is used for 10 hours a day. How many units of energy are consumed in 30 days?
1) 1
2) 10
3) 30
4) 300
Q. An echo is heard after 5 seconds of the production of sound which moves with a speed of 340 m/s. What is the distance of the mountain from the source of sound which produced the echo?
1) 0.085 km
2) 0.85 km
3) 0.17 km
4) 1.7 km
Q. What is the more common name for solid carbon dioxide?
1) Potash
2) Quick Silver
3) Epsom
4) Dry Ice
Q. Which of the following is a highly reactive metal?
1) Sodium
2) Calcium
3) Magnesium
4) Aluminium
Q. Food cans are coated with tin and not zinc because -
1) Zinc is costlier than tin
2) Zinc has a higher melting point than tin
3) Zinc is more reactive than tin
4) Zinc is less reactive than tin
Q. Which metal is used for making the filaments of electric bulbs?
1) Tungsten
2) Copper
3) Silver
4) Brass
Q. Which of the following statements is/ are correct about 'Bar Magnet'?
I. The Bar Magnet is a permanent magnet.
II. The strength of a permanent magnet cannot be changed.
III. A permanent magnet produces a comparatively weak force of attraction.
Correct code is -
1) Only I
2) Only I and II
3) I, II, III all
4) None of the above
Q. The correct relation between the radius of curvature R and focal length f of a spherical mirror is -
1) R = f
2) R = 2f
3) R = 3f
4) R = 4f
Q. A lemon kept in water in a glass tumbler appears to be larger than its actual size. It is because of -
1) reflection of light
2) scattering of light
3) refraction of light
4) polarization of light
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