Q11. Domestic electric wiring is basically:
(a) A series connection
(b) A parallel connection
(c) A combination of series and parallel connection
(d) There is series connection in each room and parallel connection
(b) A parallel connection
Q12. The device for converting alternating current to direct current is called-
(a) Inverter
(b) Rectifier
(c) Transformer
(d) Transmitter
(b) Rectifier
Q13. On heating, the resistance of a semi-conductor-
(a) Remains unchanged
(b) Decreases
(c) Increases
(d) None of above
(b) Decreases
Q14. Cyclotron is used to accelerate-
(a) Neutron
(b) Proton
(c) Proton
(d) Ions
(b) Proton
Q15. What is the source of electricity in an artificial satellite?
(a) Solar cells
(b) Small nuclear reactor
(c) Dynamo
(d) Thermopile
(a) Solar cells
Q16. Which of the following is a space shuttle?
(a) Eposis
(b) Cassini
(c) Spitzer
(d) TecSAR
(b) Cassini
Q17. The project Director of Chandrayan-2 is
(a) C. Rangarajan
(b) A.P.J. Abdul Kalam
(c) P. Chidambaram
(d) Dr. M. Annadurai
(d) Dr. M. Annadurai
Q18. Cryogenic engines are used in-
(a) submarine engines
(b) defrost refrigerators
(c) rocket technology
(d) superconductivity related researches
(c) rocket technology
Q19. The short-range missile Trishul, that has been tested from Chandipur is:
(a) a subsonic missile
(b) a supersonic missile
(c) a hypersonic missile
(d) none of these
(b) a supersonic missile
Q20. DNA was first synthesised in the laboratory by-
(a) Miller
(b) Khurana
(c) D. Vries
(d) Kelvin
(b) Khurana