# Competitive Exams: Physics MCQs (Practice_Test 33 of 35)

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- A 2 kg mass is acted upon by a force which gives a time dependent displacement of x = t . The work done in the time interval 0 to to is:
- 0.5 to
- to
- t2o
- t3 o

- Two point particles with masses m1 and m2 are thrown at angles q1 and q2 with the horizontal with speeds of v1 and v2 respectively. T, H and R represent the total time of flight, the maximum height attained and the horizontal range covered respectively. If v1 sin q1 = v2 sin q2 then for both the particles
- T and H will be the same but T will be different
- T and R will be the same but H will be different
- H and R will be the same but T will be different
- T, H, and R will be different

- It is easier to roll a stone up a sloping road than to lift it vertical upwards because
- work done in rolling is more than in lifting
- work done in lifting the stone is much more than rolling it
- work done in both is same but the rate of doing work is less in rolling
- work done in rolling a stone is less than in lifting it

- A sphere of radius R and mass M rolls without slipping on a surface with speed ‘v’ The ratio of translational KE and rotational KE is
- 5

- Match List I (Conservation Law) with List II (Associated symmetries) and select the correct answer
List-I List-II - Energy
- Linear momentum
- Angular momentum

- Homogeneity of space
- Isotropy of space
- Homogeneity of time

- A
- B
- C

- 3
- 2
- 1

- 1
- 2
- 3

- 3
- 1
- 2

- 2
- 1
- 3

- Consider the following forces
- Nuclear force
- Electromagnetic force
- Weak force
- Gravitational force

The correct sequence of these forces in order of increasing values of their magnitude is

- 4,3, 1,2
- 4,3, 2,1
- 3,4, 2,1
- 3,4, 1,2

- Two satellites of masses M and 9M ar orbiting a planet in orbits of radius R. Their periods of rotation will be in the ratio of
- 9: 1
- 3: 1
- 1: 1
- 1: 3

- In the case of geostationary satellite, the
- rotation of the earth and the revolution of the satellite will be in the same direction
- rotation of the earth and revolution of the satellite will be in opposite directions
- angular velocity of the earth՚s rotation and angular velocity of revolution of the satellite will be equal and be in the same direction
- angular velocity of the earth՚s rotation and angular velocity of revolution of the satellite will not be equal

- What is the correct sequence of the following in increasing order of their values of ‘g’ (acceleration due to gravity) ?
- Moon
- Jupiter
- Earth
- Mars

Select the correct answer using the codes given below

- 1,4, 2,3
- 1,3, 2,4
- 1,3, 4,2
- 1,4, 3,2

- In the case of suspensions shown in the given diagrams, the natural frequencies of the three simple harmonic oscillators will be in the ratio of
- (2) : 1: 1/ (2)
- 21: 1:
- : 1: 2
- 1/ (2) : 1: (2)

- The force needed to punch a hole of diameter 7cm in a steel plate of thickness 2/p cm and ultimate shear strength of 350 × 106 Nm-2 is
- 4.9 × 105N
- 9.8 × 105N
- 34.3 × 105N
- 68.6 × 105N

- Which one of the following is the best example of an elastic collision? The collision between
- a ball and the floor
- a bullet and the target
- a truck and a car
- molecule

- Particle A has a velocity of 2 × 108 m/s and another particle B has a velocity of-2 × 108 m/s. The velocity of A relative to B is
- 4 × 108 m/s
- zero
- 2.76 × 108 rn/s
- 1.38 × 108 m/s

- Energy corresponding to the rest mass of a positron is
- 1.02 MeV
- 0.51 keV
- 0.51 MeV
- None of the above

- Match List I (Property at fluid) with List II (Law of fluid motion) and select the correct answer
List-I List-II - Volume rate of flow
- Viscous drag
- Speed of efflux (exit)
- Pressure difference between two points in a flow tube

- Bernoulli՚s theorem
- Torricelli՚s theorem
- Stoke՚s law
- Poiseuille՚s law

- A
- B
- C
- D

- 4
- 3
- 1
- 2

- 3
- 4
- 1
- 2

- 3
- 4
- 2
- 1

- 4
- 3
- 2
- 1