PHYSICS PAST QUESTIONS

The crackling noise produced by aluminum roofing sheets on a house during a hot sunny day is a result of

The pair of musical instruments that works on the vibration of air in pipes is

Which of the following statements about the 3rd overtone of a vibrating air column of an open pipe is correct? It has

Resonance occurs when one vibrating object causes a second object to vibrate at its own natural

The resultant force in a couple is

Which of the following statements about matter is not correct?

A vapour whose molecules are in dynamic equilibrium with those of its own liquid is said to be

The diagram given is used to determine the

The dimensions of momentum are

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

The continuous stirring in the method of mixtures to determine the specific thermal capacity of a substance ensures

A student measures the volume of a liquid using a measuring cylinder. What else needs to be measured by the student in order to determine the density of the liquid?

An object of volume 400cm³ and 2.5gcm^-3 is suspended from a spring balance with half its volume immersed in water. Determine the reading on the spring balance. (Density of water = 1gcm^-3)

Which of the following electromagnetic waves is most energetic?

In an experiment in which a molten substance is allowed to cool, the cooling curve above was obtained. The temperature 60^oC is known as the

An object floats in a fluid when it displaces it's

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 chemical balance is used for measuring

A pressurized perfume bottle is left on the window pane of a room. What happens to he gas molecules of the perfume on a sunny day? They

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.

The diagram above illustrates a beaker of water being heated. It is observed that as the bubbles rise they get bigger in size.The reason for this observation is

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

The S.I unit for sound energy is

A body is whirled round a circular path at constant speed. Which of the following diagrams correctly indicates the direction of the body's velocity (v) and its acceleration (a)?

Which of the following graphs correctly represents the relationship between the kinetic energy (K.E) and the displacement (d) from point of release of a swinging pendulum bob?

The diagram above illustrates a block ans tackle pulley system in which an effort E supports a load of 100.0N. If the efficiency of the machine is 75%, calculate the value of E

In the clinical thermometer, the function of the kink is to

i. Prevent the back flow of mercury after use.

ii. Ensure the back flow of mercury after use.

iii. Maintain the thermometric property of mercury.

iv. Allow the temperature attained to be read.

Which of the following devices converts light energy to electrical energy?

Which of the following statements correctly defines the boiling point of a liquid? The temperature at which the

Which of the following processes is not a surface phenomenon?

Materials that can be stretched and still return to their original forms when the stresses are removed are said be

The diagram above illustrates two waves of equal amplitudes A and frequencies approaching each other. When the two waves meet at a point I midway between them, the vertical displacement of the resulting wave will be

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

Which of the following statements describes a body in a stable equilibrium correctly?

Plane waves through a narrow gap emerge as circular waves. This phenomenon is known as

The diagram above is a micrometer screw gauge. Determine its reading

A battery of emf 24V is connected to three resistor P, Q and R as illustrated in the diagram. Determine the voltage across the resistor Q

A uniform bar AB is balanced on a knife-edge which is 60cm from B by a mass of 22g which hangs at C 10cm from A. Calculate the mass of the bar.

In an experiment in which a molten substance is allowed to cool, the cooling curve above was obtained. The temperature 60^oC is known as the

Which of the following substances lowers the surface tension of water?

Two plane mirrors are inclined at an angle 20° to each other. Determine the number of images formed when an object is placed between them.

An object at rest is said to possess

Consider the wave equation:  $y=10sin(x-50t)$, What does the number 10 represent?

The diagram given illustrates a force-distance graph for the motion of a wooden block. Determine the work done on the block when moved through a distance of 5m.

A plank is placed along the path on which a wheel barrow containing sand is pushed at a construction site to prevent it from sticking as illustrated in the diagram given. The large area of the plank prevents the wheel barrow from getting stuck by

X-rays and infrared rays are both electromagnetic. Which common property do the waves have? Both waves

When a body is thrown vertically upwards, its velocity at the maximum height is

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?

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

A uniform metre rule is balanced on a fulcrum placed at the 35cm mark by suspending a mass of 120g at the 10cm mark. Calculate the mass of the metre rule.

Frequency is measured in

The slope of a straight-line velocity-time graph represents

The image formed by a concave mirror is real, inverted and magnified, when object is placed

Two strings each inclined at an angle 30^o to the horizontal are used to hold a bucket of water weighing 20N. Calculate the tension i n each string.

Which of the following quantities are dimensionally independent?

I. Dielectric constant

II. Momentum

III. Efficiency

IV. Refractive index

A body can undergo the following types of motion except

The diagram given, represents the graph of stress against strain for an elastic wire. The point Q on the graph is the

A quantity of hot water at 100^oC is added to 400g of water at 10^oC until the temperature of the mixture is 60^oC.

Calculate the mass of the hot water added. [Specific heat capacity of water =4200JKg^-1 K^-1]

The diagram given illustrates the waveform of a note produced by vibrations in an air column of length L. If the speed of sound in air is V, derive an expression for the frequency of the notes

Thermal energy added or removed from a substance that changes the state of the substance is called