Which of the following is consistent with Charles’ law?
I. 
II. 
III. 
IV. 
- A. I
- B. II
- C. III
- D. IV
Which of the following readings cannot be determined with a meter rule?
- A. 2.56cm
- B. 2.25cm
- C. 2.50cm
- D. 2.05cm
A body was slightly displaced from its equilibrium position. Which one of the following is a condition for its stable equilibrium
- A. an increase in the kinetic energy of the body
- B. an increase in the potential energy of the body
- C. a decrease in the kinetic energy of the body
- D. an increase in the height of the body
A mass of 0.5kg is whirled in a vertical circle of radius 2m at a steady rate of 2 rev/s. Calculate the centripetal force
- A. 164N
- B. 160N
- C. 158N
- D. 172N
A cone is in unstable equilibrium, has its potential energy
- A. decreased
- B. increased
- C. unchanged
- D. oscillating
The height at which the atmosphere ceases to exist is about 80km. If the atmospheric pressure on the ground level is 760mmHg, the pressure at a height of 20km above the ground level is
(ρm = 13.6g/cm\(^3\) ρ = 0.00013g/cm\(^3\) )
- A. 380mmHg
- B. 570mmHg
- C. 190mmHg
- D. 480mmHg
The equilibrium position of objects in any field corresponds to situation of
- A. equipotential energy
- B. maximum potential energy
- C. minimum potential energy
- D. minimum kinetic energy
The diagram shows a uniform meter rule AB which balances horizontally at the 90cm mark when a mass of 0.2kg is suspended from B. Calculate the mass of the meter rule.
- A. 0.05kg
- B. 0.20kg
- C. 0.80kg
- D. 1.00kg
A body moves in SHM between two point 20m on the straight line Joining the points. If the angular speed of the body is 5 rad/s. Calculate its speed when it is 6m from the center of the motion.
- A. 20 m/s
- B. 30 m/s
- C. 40 m/s
- D. 50 m/s
In Sunlight, a blue flower looks blue because we see the flower by the light it
- A. receives from our eyes
- B. disperses
- C. absorbed
- D. reflect
The volume of a stone having an irregular shape can be determined using?
- A. meter rule
- B. measuring cylinder
- C. vernier calliper
- D. micrometer screw gauge
Which of the following bodies, each with centre of gravity G, lying on a horizontal table, is/are in unstable equilibrium?
- A. II only
- B. III only
- C. I & IV only
- D. II & III only
“Sum of all forces acting on a body is zero.” This condition represents equilibrium’
- A. First condition
- B. Second condition
- C. Third condition
- D. Fourth condition
A well 1km deep is filled with a liquid of density 950kg/m\(^3\) and g = 10m/s\(^2\), the pressure at the bottom of the well is
- A. 9.6 × 10\(^6\)N/m\(^2\)
- B. 9.5 x 10\(^5\)N/m\(^2\)
- C. 9.4 x 10\(^6\)N/m\(^2\)
- D. 9.5 x 10\(^6\)N/m\(^2\)
Efficiency of conduction in liquids and gases compared to solids is
- A. less efficient than solid
- B. more efficient than solids
- C. equally efficient to solids
- D. efficiently may vary
Which of the following statements is/are correct for a freely falling body?
I. the total is entirely kinetic
II. the ratio of potential energy to kinetic energy is constant
III. the sum of potential and kinetic energy is constant
- A. I only
- B. II only
- C. III only
- D. I & III only
An object is acted upon by a system of parallel forces causing the object to be in state equilibrium. Which of the following statement is not correct
- A. the resultant of the parallel forces is zero
- B. the algebraic sum of all the moments of the forces is zero
- C. all the parallel forces must not be equal in magnitude and direction
- D. the sum of forces in one direction must be equal to the sum of forces in the opposite direction
The diagram shows four positions of the bob of a simple pendulum. At which of these positions does the bob have maximum kinetic energy and minimum potential energy
- A. 1
- B. 2
- C. None Of The Above
- D. 4
A rectangular solid block has length 10cm, breadth 5cm and height 2cm. If it lies on a horizontal surface, and has density 100kg/m\(^3\), calculate the pressure it exerts on the surface.
- A. 20 N/m\(^2\)
- B. 100 N/m\(^2\)
- C. 400 N/m\(^2\)
- D. 300 N/m\(^2\)
Which of the following statements are correct of the production and propagation of waves?
I. vibration produces waves
II. waves transmit energy along the medium
III. the medium through which the wave travels does not travel with the wave
IV. waves do not require any medium for transmission
- A. I & IV only
- B. II & IV only
- C. III & IV only
- D. I, II and III only
The angular dispersion of a prism depends on
- A. The index of refraction only
- B. The angle of incidence as well as the index of refraction
- C. The angle of incidence only
- D. The thickness of the prism only