The S.I. Unit of sound energy is

The general definition of elastic modulus is

The diagram above illustrates a simple barometer. Which distance measures the atmospheric pressure?

The property of a body to remain at rest or to continue in a uniform motion in a straight line is called

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 fixed point. Which of the statements above are correct?

A dam is able to hold a large quantity of water because its wall is

A body of mass m moving round 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 block is acted upon by two horizontal forces as illustrated in the diagram above. The block accelerated at 1.5ms¯². Calculate the mass of the block

Which of the following quantities are dimensionally independent? I. dielectric II. Momentum constant III. Efficiency IV. Refractive index

A body is projected with an initial velocity 'u' at angle to the horizontal. If Rmax is the maximum range of the projectile, what does the relation u²/Rmax represent?

An object at rest is said to possess

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

The graph of density against temperature for water is correctly illustrated by

A football is kicked at an angle of 45° to the horizontal over a defence line up with a velocity of 15ms¯¹. Calculate the magnitude of horizontal velocity of the ball at its highest point. (Neglect friction, gravity 10ms¯²)

The ice point on the absolute scale of temperature is

Which of the following factors does not increase the rate of evaporation of water in a lake?

The bob of a simple pendulum take 8.0s to complete 10 oscillations. Determine the frequency of oscillation of the bob

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

Frequency is measured in

Which of the following electromagnetic waves is most energetic?

Rainbow formation is a natural phenomenon illustrating that white

The lens illustrated above can best be described as a

Two plane mirrors are inclined to each other such that an object placed between them has 11 images. Determine the angle of inclination

The pitch of a note is not affected by

When two flat plate conductors are arranged in such a way that they possess equal and opposite charges separated by a dielectric, they form a or an

Which electrical device does the diagram above illustrate?

A simple barometer is constructed using a liquid Q, of density 16.2g/cm³. Calculate the least length of the tube to be used to measure pressure of 1.5 atmospheres. (Density of mercury = 13.6g/cm³, 1 atmosphere = 76.0cm of mercury)

A bar AB is balanced horizontally on two knife edges as illustrated in the diagram above. Determine the weight of the bar

To obtain a virtual, erect and magnified image from a thin converging lens, an object must be placed

The diagram above represents a transverse travelling wave. Which two points are 180^\circ out of phase?

Two objects P and Q of masses 100 kg and 20 kg respectively are 1.2m apart on a horizontal surface. Calculate the net gravitational force acting on Q.
(G = 6.67 × 10⁻¹¹ Nm²kg⁻²)

The primary of a transformer has 100 turns and its secondary has 200 turns. If the voltage at the primary is 100V, determine the voltage at the secondary

In the diagram illustrated above, a block of mass M is at rest on a plane inclined at an angle \theta to the horizontal. As \theta increases, the velocity ratio of the plane

When the speed of a car is halved, its kinetic energy is

A wire of length 400cm is stretched between two fixed points. When plucked, its fundamental frequency is 150Hz. Calculate the speed of the wave produced.

The diagram above illustrates a wavefront. Determine the number of wavelengths in it.

A resistor with fixed resistance value is called

Which of the following statements is not an advantage of an alkaline accumulator

The diagram above illustrates the wire connections to a three-pin plug. The wires P, Q and R respectively are

Which of the following statements about parallel plate capacitors is or are correct? I. Capacitance of the capacitor is inversely proportional to the distance between the plates II. Capacitors can filter a.c. signals from d.c. III. Capacitors can store charges

A circuit contains three ammeters A1, A2 and A3 with readings of A2 and A3 as indicated in the diagram above. Determine the reading of A1.

Which of the following statements about magnetic lines of force is not correct?

In which of the following activities is an induction coil not useful?

In a series R.L.C. circuit, R = 10Ω, XC = 4Ω and XL = 9Ω. The impedance of the circuit is

A student uses two compass needles to investigate the magnetic field around a bar magnet. Which of the following diagrams shows the correct directions of the needles?

Which of the following particles may be emitted in a process of natural radioactivity?

In which of the following situations is photoelectric effect employed? I. Automatic devices for switching on light at dusk II. Automatic doors in department stores III. Automatic devices for switching on air conditioners IV. Automatic voltage stabilization.

Which of the following radiations has the longest wavelength?

In which of the following fields is radioisotopes not used?

A nuclide is represented by ⁷⁰₃₂B. Determine its neutron-proton ratio