CET-KARNATAK Questions Paper 

1. Intensity level of sound whose intensity is 10-8 Wm-2 is :
(a) 80 dB                              
(b) 8 dB
(c) 4 dB                                             
(d) 40 dB                                                      
Ans (d)
2. In single slit experiment, the width of the slit is reduced. Then, the linear width of the principal maxima :
(a) decreases but becomes less bright
(b) increases but becomes less bright
(c) decreases but becomes more bright
(d) increases but becomes more bright                                                                      
Ans (b)
3. A straight current carrying conductor is kept along the axis of circular loop carrying current. The force exerted by the straight conductor on the loop is :
(a) zero
(b) perpendicular to the plane of the loop
(c) in the plane of the loop, away from the centre
(d) in the plane of the loop, towards the centre                                                      
Ans (b)
4. Pick out the wrong statement :
(a) An electron at rest experiences no force in the magnetic field
(b) The gain  in the KE of the electron moving at right angles to the magnetic field is zero
(c) When an electron is shot at right angles to the electric Held, it traces a parabolic path
(d) An electron moving in the direction of thx electric field gains KE                                                              
Ans (d)
5. Spectrum of sunlight is an example for :
(a) continuous absorption spectrum
(b) band emission spectrum
(c) line absorption spectrum
(d) continuous emission spectrum                                                                               
Ans (d)
6. Copper and Germanium are cooled from room temperature to 100 K. Then, the resistance of :
(a) germanium increases, copper increases
(b) germanium- decreases, copper increases
(c) germanium decreases, copper decreases
(d) germanium increases, copper decreases                                                             
Ans (d)
7. The most stable particle in the Baryon group is :
(a) sigma particle               
(b) neutron
(c) proton                            
(d) lambda particle                                               
Ans (b)
8. Frequencies of light incident on a system of scattering particles are in the ratio of 1:2 . Then, the intensity of scattered light in a particular directions is
(a) 1 : 16                              
(b) 1 : 4
(c) 1 : 2                                             
(d) 1 : 8                                                                    
Ans (a)
9. Milk is an example for :
(a) emulsion                                    
(b) inelastic gel
(c) foam                                           
(d) elastic gel                                                          
Ans (a)
10. A particle executes SHM with amplitude 0.2 m and time period 24 s. The time required it to move from the mean position to a point 0.1 m from the mean position is :
(a) 12 s                                             
(b) 2 s
(c) 8 s                                                
(d) 3 s                                                                       
Ans (b)
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