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

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?

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

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?

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

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

Which of the following processes is not a surface phenomenon?

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

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

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

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

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.

Which of the following statements about matter is not correct?

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

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 maximum density of water occurs at a temperature of

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

Complementary colours are those which

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

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

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

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

Which of the following units is derived?

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)?

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

Which of the following quantities are dimensionally independent?

I. Dielectric constant

II. Momentum

III. Efficiency

IV. Refractive index

A ball is projected horizontally from the top of a tower. Neglecting air resistance, which of the following statements about its motion is/are correct?

I. Vertical acceleration on the ball decreases as it falls

II. The vertical force on the ball remains constant

III. The vertical speed of the ball increases as it falls

An object at rest is said to possess

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 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.

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 is correct about the effect of dissolved salt on the freezing point of water?

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

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.

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

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

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

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

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.

The mouth piece of a telephone handset converts

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

The angle at which a projectile must be fired to cover maximum range is

The diagram given is used to determine the

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 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

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

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

A chemical balance is used for measuring

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

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.

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

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

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

The ice point on the absolute scale of temperature is

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

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

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