The barometer was invented by

A. Michael Faraday

B. Torricelli

C. Thomas Alva Edison

D. Benjamin Franklin

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  1. The mass number and the atomic number of an element are X and Y respectively. The number oC neutrons…
  2. If a band is played on the moon the sound will
  3. If the speed of the rotation of the earth increases the weight of a body
  4. If you want to open a door with les difficulty you push it
  5. A pair of stars that revolve round each other is
  6. The temperature of a large bucket-full of hot water (a few degrees below boiling point) is lower than…
  7. When white light passes through a glass prism we get a spectrum on the other side of the prism. In the…
  8. When we tighten the string of a sitar or tanpura its pitch
  9. Which is the densest planet of the solar system?
  10. A bucket of water is hung from a spring balance. A piece of iron is suspended in the water without touching…
  11. Like magnetic poles
  12. Which of the following revolves round the nucleus in an atom?
  13. Primary colours are
  14. When a body is immersed in a fluid the force of buoyancy of the fluid on the body depends on
  15. The tiniest of the stars belong to the group known as
  16. The heat generated in a conductor carrying current is proportional to
  17. The strength of an electromagnet can be increased by
  18. Rays from the headlight of a motor car are rendered parallel by suitably using
  19. The inside of both the walls of a thermos flask is silvered i.e., on the vacuum side in order to reduce…
  20. An ammeter has
  21. Mica is used in an electric iron because it is a
  22. The brightest star visible to the naked eye is
  23. Photoelectric cell is a device which converts
  24. The loudness of a sound is determined by
  25. The instrument used to measure the strength of electric current at a point is
  26. The red colour of the setting sun is due to
  27. The power of a lens is
  28. For an electron orbiting in a hydrogen atom, the necessary centripetal force keeping it in orbit is…
  29. Heat is transmitted from one end of a metal rod to its other end by the method of
  30. When the velocity of a body is halved