GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 033

GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 033

321). Which of Jupiter's moons are larger than the planet Mercury?
1. IO 2. Europa 3. Ganymede 4. Callisto
A). 1 and 2
B). 1 and 3
C). 2 and 4
D). 3 and 4

Answer: 3 and 4

   
322). A body is just floating in a liquid the density of which is equal to that of the body. If the body is slightly pressed down and released, it will
A). sink to the bottom
B). come back to the same position immediately
C). come back to the same position slowly
D). start oscillating

Answer: sink to the bottom

   
323). The energy of a particle moving at 5ms^−1 is 125 J. It mass is
A). 4 kg
B). 6 kg
C). 10 kg
D). 25 kg

Answer: 10 kg


   
324). For a System of pulleys, the mechanical advantage is Taking g=10ms^−2, the force We required to lift a mass of 100 kg by it is
A). 50N
B). 150N
C). 200N
D). 250N

Answer: 250N


   
325). A trolley of mass 20 kg carries 16 kg grain and moves on a horizontal smooth and straight track at 20ms^−1. If the grain starts leaking out of a hole at the bottom at time t = 0s at the rate of 0.5kgs^−1 , the speed of the trolley at t = 22 s will be nearly
A). 13.5ms^−1
B). 15ms^−1
C). 24ms^−1
D). 26ms^−1

Answer: 24ms^−1



326). A hollow sphere and a solid sphere, both having the same mass of 5 kg and radius 10 m are initially at rest. If they are made to roll down the same inclined plane without slipping, the ratio of their speeds when they reach the bottom of the plane, vhollow / vsolid, will be
A). 1
B). 7/√10
C). 7/√12
D). √21/√25

Answer: √21/√25



   
327). A particle is executing simple harmonic motion. Its total energy is proportional to its
A). displacement from equilibrium position
B). frequency of oscillation
C). square of amplitude of motion
D). velocity at equilibrium position

Answer: square of amplitude of motion


   
328). A car travelling at a speed of 30 km per hour is brought to rest in 8 metres by applying brakes. If the same car is travelling at 60 km per hour, it can be brought to rest with the same breaking force at a distance of
A). 16 m
B). 24 m
C). 32 m
D). 36 m

Answer: 32 m


   
329). A wave undergoes reflection from a rigid boundary. One of its characteristic parameters that changes is
A). frequency
B). phase
C). velocity
D). wavelength

Answer: phase

   
330). An electric heater draws 10 A current from a 220 V service mains. The cost of one unit of electricity is Rs. 2.
With reference to this, consider the following statements
I. The resistance of the heater is 22 Ω

II. Heating rate in W is 2.2 kW
III. Heating rate in Cal/s is 924 Cal/s
IV. The cost of operating the heater for 2.5 hours is Rs.11
Which of the following statements are correct ?
A). I, II, III and IV
B). I, II and III
C). I, II and IV
D). III and IV

Answer: I, II and IV