Sunday, 21 February 2016

Physics for SSC CGL 2016



1. Water drops do not stick to the oily surface due to
(a) Lack of adhesive force             
(b) Surface tension                                      
(c) Cannot mix each other                 
(d) Water is lighter than oil

2. Newton’s first law is also called as
 (a) law of moments                        
 (b) law of inertia      
 (c) law of energy                              
 (d) law of momentum

3. If we want to calculate the pressure of a liquid at the bottom of vessel, the quantity which is not required to determine it, is
 (a) Height of the liquid column                 
 (b) Surface area of the bottom of the vessel
 (c) Density of the liquid                 
 (d) Acceleration due to gravity at the bottom of the vessel

4. The clouds float in the atmosphere because of their low
   (a) Temperature                            
   (b) velocity                
   (c) Pressure                                      
   (d) density

5. Low temperature (cryogenics) find application in:
(a) Space travel, surgery and magnetic levitation                    
(b) surgery, magnetic levitation and telemetry                  
(c) space travel, surgery and telemetry                      
(d) space travel, magnetic levitation and telemetry

6. The change of a solid into vapour directly is called
(a) Vaporization                                
(b) freezing                
(c) melting                                           
(d) sublimation

7. What is the principle by which a cooling system (Radiator) in a motor car works?
(a) Conduction only                         
(b) convection                    
(c) Radiation only                
(d) both conduction and radiation

8. Which of the following is the best conductor of the heat?
(a) Mercury                                         
(b) silver                 
(c) leather                                            
(d) benzene

9. in the winter season if we touch two blocks one of iron and another of wood in the early morning then the block of iron appears to be more cold because
(a) The temperature of the iron block is less than that of the wooden block                  
(b) Iron is a bad conductor of heat in comparison of the wood
(c) Iron is a bad conductor of heat in comparison of the wood                 
(d) The block of iron is heavier than the wood block

10. Which of the following types is used by computed tomography employed for visualization of the internal structure of human body?
(a) X- rays                                              
(b) sound waves                
(c) Magnetic resonance                   
(d) radio-isotopes

11. When light waves pass from air to glass, the variables affected are
(a) Wavelength, frequency and velocity                  
(b) Velocity and frequency                 
(c) Wavelength and frequency                
(d) Wavelength and velocity

12. Which of the following types of glass can cut of ultraviolet rays?
(a) Soda glass                                      
(b) Pyrex glass            
(c) jena glass                                       
(d) crooks glass

13. Which of the following is used in oven?
(a) X-rays                                             
(b)UV-rays                 
(c) Microwaves                                   
(d)Radio waves

14. Which one of the following has highest frequency?
(a) cosmic rays                                   
(b) X-rays                
(c) radio waves                                  
(d) microwave

15. Which of the following electromagnetic waves has the longest wavelength?
(a) Infrared rays                                
(b)gamma rays                   
(c) light rays                                      
(d) ultraviolet rays

16. X-rays were discovered by-
(a) Roentgen                                      
(b) Becquere                
(c) Curie                                                
(d) Van lane

17. Doppler effect is independent of
(a) Velocity of source                  
(b) Velocity of listener                
(c) Distance between source and observer                 
(d) none of these

18. Ultra violet light of sun’s radiation is prevented from reaching the earth’s atmosphere by the layer of
(a) oxygen                                           
(b) hydrogen                 
(c) ozone                                              
(d) helium

19. Optical fibre works on the principle of
(a) Total internal reflection           
(b) Refraction                 
(c) Scattering                                      
(d) interference

20. An air bubble in water will act like a
(a) Convex mirror                             
(b) convex lens                
(c) Concave mirror                          
(d) concave lens

Answer

1.      A
2.      B
3.      B
4.      A
5.      A
6.      D
7.      B
8.      B
9.      B
10.  A
11.  D
12.  D
13.  C
14.  A
15.  A
16.  A
17.  C
18.  C
19.  A
20.  D
 

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