Two plane mirrors are inclined to each other such that an object placed between them has 11 images. Determine the angle of inclination
- A. 30°
- B. 45°
- C. 60°
- D. 90°
The lens illustrated above can best be described as a
- A. converging meniscus
- B. plano-convex
- C. diverging meniscus
- D. bi-convex
Rainbow formation is a natural phenomenon illustrating that white light
- A. splits into three components after rainfall
- B. is dispersed by glass prisms
- C. splits into its constituent colours before rainfall
- D. is dispersed into its constituent colours after rainfall
Which of the following electromagnetic waves is most energetic?
- A. Radio waves
- B. X-ray
- C. Gamma rays
- D. Ultra-violet rays
Frequency is measured in
- A. meter per second
- B. seconds
- C. hertz
- D. farad
The diagram above illustrates the mercury-in-glass thermometer used for determining the temperature of a room. Use the data on it to determine the room temperature.
- A. 3.3°C
- B. 7.0°C
- C. 13°C
- D. 30.0°C
The bob of a simple pendulum takes 8.0s to complete 10 oscillations. Determine the frequency of oscillation of the bob.
- A. 0.125Hz
- B. 1.25Hz
- C. 7.50Hz
- D. 8.00Hz
Which of the following factors does not increase the rate of evaporation of water in a lake?
- A. Increase in the pressure of the atmosphere
- B. Rise in temperature
- C. Increase in the surface area of the lake
- D. Increase in the speed of the wind
The ice point on the absolute scale of temperature is
- A. 0K
- B. 32K
- C. 100K
- D. 273K
A football is kicked at an angle of 45° to the horizontal over a defense line up with a velocity of 15\(ms^{-1}\). Calculate the magnitudeof horizontal velocity of the ball at its highest point [Neglect friction, g = 10\(ms^{-2}\)].
- A. 0.0\(ms^{-1}\)
- B. 5.6\(ms^{-1}\)
- C. 10.6\(ms^{-1}\)
- D. 15.0\(ms^{-1}\)
The graph of density against temperature for water is correctly illustrated by
- A. I
- B. II
- C. III
- D. IV
According to Newton’s law of cooling, the heat energy lost per unit area of a body depends on the
I. Surface area
II. Nature of the surface
III. Temperature of the surface
IV. Excess temperature over the surroundings
- A. I and II only
- B. II and IV only
- C. I,II and III
- D. I, II and IV
An object at rest is said to possess
- A. potential energy
- B. kinetic energy
- C. chemical energy
- D. electrical energy
A body is projected with an initial velocity u at angle \(\theta\) to the horizontal. If \(R_{max}\) is the maximum range of the projectile, what does the relation \(\frac{u^{2}}{R_{max}}\) represent?
- A. The vertical distance covered
- B. Acceleration due to gravity
- C. The horizontal distance covered
- D. The acceleration of the body
Which of the following quantities are dimensionally independent?
I. Dielectric constant II. Momentum III. Efficiency IV. Refractive index
- A. I and II
- B. II, III and IV
- C. I, II, III and IV
- D. I, III and IV
A block is acted upon by TWO horizontal forces as illustrated in the diagram above. The block accelerates at 1.5\(ms^{-2}\). Calculate the mass of the block.
- A. 6kg
- B. 9kg
- C. 10kg
- D. 15kg
A body of mass m moving around a circle of radius r with a uniform speed v experiences a centripetal force F. The work done by the centripetal force on it is
- A. Fv
- B. zero
- C. Fmr
- D. \(\frac{Fr}{m}\)
A dam is able to hold a large quantity of water because its wall is
- A. thickest at the top
- B. thickest at the middle
- C. thickest at the bottom
- D. of the same thickness throughout
During a training session, two footballers pass a ball repeatedly between each other. The ‘to and fro’ motion of the ball is not simple harmonic because the
I. Acceleration of the ball is not directed towards a fixed point
II. Restoring force is not directed towards the centre
III. Acceleration of the ball is not directly proportional to the displacement from a fixed point
Which of the statements above are correct?
- A. I and III only
- B. I and II only
- C. II and III only
- D. I, II and III
The property of a body to remain at rest or to continue in uniform motion in a straight line is called
- A. momentum
- B. Inertia
- C. impulse
- D. Energy
The diagram above illustrates a simple barometer. Which distance measures the atmospheric pressure?
- A. PQ
- B. QR
- C. RS
- D. QS