Physics part 2

               1.  Consider the following electromagnetic waves

1.       X-rays

2.       Gamma- rays

3.       Microwaves

4.       Radio waves

What is the correct sequence in the order of their increasing energy?

         (a)    4, 3, 1 , 2

         (b)   1, 3, 2, 4

        (c)    4, 2, 1, 3

        (d)   1, 4, 3, 2

             2.     The best ant the poorest conductors of heat are respectively

        (a)    Silver (Ag) and lead (Pb)

        (b)   Copper (Cu) and aluminum (Al)

        (c)    Silver (Ag) and gold (Au)

       (d)   Copper (Cu) and gold (Au)

          3.   Which of the following is used as a moderator in nuclear reactor?

(a)    Ordinary water

(b)   Radium

(c)    Thorium

(d)   Graphite

          4. who among the following received Nobel prize twice ofr the same subject?

(A)   Mari curie

(B)   Frederic Jolit

(C)   Frederic Sanger

(D)   Stanley Cohen

          5. Consider the following statements

1.       Discovery of Higgs Boson of which scientists are almost certain, may discard Einstein’s special theory of relativity

2.       Probable discovery of a particle which moves faster than light may prove Stephen Hawking wrong.

3.       Probable discovery of a particle that moves faster than light may go against Einstein’s special theory of relativity.

Which of the statements given above is / are correct?

(a)    1  and 2

(b)   Only 1

(c)    Only 3

(d)   1 and 3

        6.  What is difference between Bluetooth and Wi-Fi- devices?

(a)    Bluetooth uses  2.4 GHz radio frequency band, whereas Wi – Fi can use 2.4 GHz or 5 Ghz frequency band

(b)   Bluetooth is used for Wireless Local Area Networks (WLAN) only, Wi-Fi is used for wireless wide Area Networks (WWAN) only.

(c)    When information is transmitted between two devices using Bluetooth technology, the devices have to be in the line of sight of each other, but hen Wi- Fi technology is used the devices need not be in the line of sight of each other

(d)   The statements (a)  and (b) given above are correct in these context

        7. Telescopes are placed in space to view distant galaxies primarily to

(A)   Get close to the observed objects

(B)   Avoid the absorption of light or other radiations in the atmosphere of the Earth.

(C)   Avoid light pollution from the Earth’s populated areas

(D)   Avoid steering the telescope against the Earth’s motion

          8.  Cryogenic engines find applications in

(a)    Rocket technology

(b)   Fost-free refrigerators

(c)    Sub- marine propulsion

(d)   Researches in superconductivity

          9.  in n electronic watch, the component corresponding to the pendulum of a pendulum clock is

(a)    Transistor

(b)   Balance wheel

(c)    Crystal oscillator

(d)   Diode

          10.    SONAR is mostly used by

(a)    Doctor

(b)   Engineers

(c)    Astronauts

(d)   Navigators

Answer: 

1.       A

2.       A

3.       D

4.       A

5.       D

6.       C

7.       C

8.       A

9.       C

10.   D