The transistor was invented by

A. Marconi

B. Baird

C. John Bardeen, Walter H. Brattain and William Shockley

D. Edison

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  1. The tiniest of the stars belong to the group known as
  2. A small bubble of air deep down in a lake rises up to the top of the lake. The volume of the bubble…
  3. Radio waves sent out by radio stations are reflected by
  4. Atoms which have the same atomic number but different mass numbers are called
  5. Powder clings to the skin because of
  6. When temperature decreases, resistance of metals to flow of electricity
  7. The planet that spins Caster than any other planet is
  8. In the nucleus of an atom, the uncharged particle is
  9. Skating on ice is possible because
  10. The best estimates of the age of the earth comes from the studies of
  11. The Indian Satellite System used for domestic communications, television and meteorology is known as
  12. A photon is
  13. In a river, the currents are fastest where the river la
  14. When are temperature resistance
  15. Before the invention of geostationary satellites, television stations could not transmit their programmes…
  16. The numerical reading of the Fahrenheit thermometer of a given temperature
  17. The brightest planet in the Solar System is
  18. Cosmic rays are
  19. The air inside an electric, bulb is removed to prevent
  20. If a man wants to hear clearly the echo of a sound produced by him from a hill, the hill should be away…
  21. Every action has an equal and opposite reaction is Newton's law of Motion
  22. The SI unit of electric current is
  23. Solar radiation is preferred to other sources of energy because
  24. Water has maximum density at
  25. A sensitive instrument susceptible to magnetic infiuence can be protected from external magnetic field…
  26. The ringing of an electric bell in an enclosed evacuated glass bell jar is not heard outside because
  27. A bucket of water is hung from a spring balance. A piece of iron is suspended in the water without touching…
  28. A projectile is fired at an angle with the horizontal with a small velocity. Its horizontal range will…
  29. A pressure gauge for fluids is called
  30. Choose the correct answer