GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 143

GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 143

1421). When the velocity of a body is reduced to half its initial value, then the kinetic energy of the body is reduced by........... its value.
A). 1/3
B). 1/4
C). 1/5
D). 1/2

Answer: 1/4



    
1422). Match List - l with List - II:
List - I                                       List - II
a) Coulomb's law                  1) Magnetic flux
b) Gauss law                        2) Magnetic force
c) Lorentz's law                    3) Electric flux
d) Faraday's law                   4) Electrostatic force

a b c d
A). 3 4 1 2
B). 2 1 4 3
C). 4 3 2 1
D). 1 2 3 4

Answer: 4 3 2 1


    
1423). Electro Cardiogram (ECG) is a graphic display of the
A). Time - invariant voltages produced by myocardium
B). Time - invariant current produced by myocardium
C). Time - variant voltages produced by myocardium
D). Time - variant current produced by myocardium

Answer: Time - variant voltages produced by myocardium


    
1424). Match the following:
List - I                                              List - II
a) X-rays                                 1) Henri Becquerel
b) Electron                               2) J.J. Thomson
c) Neutron                               3) James Chadwick
d) Natural radioactivity             4) Roentgen

a b c d
A). 4 1 2 3
B). 3 2 4 1
C). 4 2 3 1
D). 2 4 3 1

Answer: 4 2 3 1


    
1425). The number of generalized co-ordinates required to describe the position of a simple pendulum is
A). 1
B). 2
C). 3
D). 4

Answer: 2




1426). If g is the acceleration due to gravity and R is the radius of the earth, then escape velocity is given by the relation
A). Ve=√2g
B). Ve=2√g
C). Ve=√2Rg
D). Ve=2√Rg

Answer: Ve=√2Rg



    
1427). The relation connecting Young's modulus (E), Bulk modulus (K) and Rigidity modulus (N) is
A). 9/E=3/N+1/K
B). 9/N=3/E+1/K
C). 9/N=1/E+3/K
D). 9/E=1/N+3/K

Answer: 9/E=3/N+1/K



    
1428). The S.I. unit of gravitational constant G is
A). N kg^-2
B). Nrn Kg^-1
C). Nrn^2 Kg^1
D). Nrn^2 kg^-2

Answer: Nrn^2 kg^-2



    
1429). If the time taken tbty a cup of tea to cool from 85°C to 75°C is 1 minute, then the time taken by it to cool from 65°C to 55°C is
A). 50 seconds
B). exactly 1 minute
C). more than 1 minute
D). 30 seconds

Answer: more than 1 minute


    
1430). The rest mass of a photon is
A). zero
B). infinity
C). dependent on its wavelength
D). dependent on its velocity

Answer: zero