PHYSICS PAST QUESTIONS & ANSWERS

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

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

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

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

A rainbow is formed when sunlight is incident on water droplets suspended in the air due to

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.

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

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

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

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.

The dimensions of momentum are

A chemical balance is used for measuring

An object at rest is said to possess

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

The diagram above illustrates a wave setup between two fixed ends 4.0m apart. If the speed of the wave is 1.0 , its wavelength and frequency respectively are

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

A converging lens of focal length 10cm forms an erect image three times the size of the real object. Calculate the distance between the image and the object

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

Total internal reflection. i. is a phenomenon of refraction of light. ii. occurs when light rays travel into a denser medium. iii. occurs when the critical angle is just exceeded. iv. is a phenomenon of reflection of light. Which of the statements above are correct?

The property of a body to remain at rest or to continue in 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 a fixed point

Which of the statements above are correct?

A ray of light incident at an angle $\theta$ in a rectangular prism grazes the surface of the prism on emerging from the prism. Determine the value of the angle. [Absolute refractive index of the material of the prism is 1.5]

The mouth piece of a telephone handset converts

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

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?

Complementary colours are those which

A body can undergo the following types of motion except

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

The resultant force in a couple is

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

Which of the following units is derived?

The diagram given is used to determine the

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

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

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

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 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 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 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 statements about mass and weight are correct?

i. Weight is the force of gravity on a body.

ii. The mass of a body is the quantity of matter in the body.

iii. The weight of a body is greatest at the equator.

iv. The mass of a body is greatest at the poles

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

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

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 ice point on the absolute scale of temperature is

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

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

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

In a school compound a girl walks 40km due east from the laboratory to the staff room to submit her report. Then she returns and walks 30m due north to her classroom. Determine the magnitude of her displacement from the10m laboratory

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

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

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

Which of the following processes is not a surface phenomenon?

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

The maximum density of water occurs at a temperature of

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

A plane is inclined at an angle $\theta$ to the horizontal. Its velocity ratio is

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.

Which of the following electromagnetic waves is most energetic?

A ball is dropped from the top of a tower. Due to air resistance,it reaches terminal velocity. Which of the following statement(s) about its motion is/are correct? i. The acceleration of the ball is zero. ii. The net force on the ball is zero. iii. The velocity of the ball increases.