The diagram below illustrates a pulley system used to raise a 10kg load. If the effort F needed to raise the load is 70N, calculate the efficiency of the machine { g= 10 ms^-2}

The diagram below illustrates the force displacement of a body. Calculate the work done during the first 20m of motion.

The dispersion of light would result in which of the following phenomena?

The best colour of shirt to be worn on a bright noon day is

The image formed when an object is placed between the focus and centre of a converging lens is

For a charged body moving in an electric and magnetic crossed field, the ratio of the electric field intensity, E to the magnetic flux density, is known as

A note, K from a keyboard has an amplitude of 0.5cm and frequency 2000Hz. Another note, M from a guitar has an amplitude of 1.5 cm and frequency of 2000Hz. Which of the following statements is true if the two notes are compared?

A simple pendulum of length 0.8m is set oscillating on a plant. If the pendulum completes 20 oscillations in 60s, calculate the acceleration due to gravity on this planet. {pie= 3.14}

The diagram below indicates the current induced in a coil as a result of relative motion between it and a bar magnet. Which of the diagram illustrates the direction of the induced current?

If two bodies, A and B are each in thermal equilibrium with another body C, then the three bodies are in the thermal equilibrium with each other. This is statement of

A constant voltage source in the circuit below supplies a sinusoidal alternating e.m.f. the voltage marked against the components are the peak values. Determine the peak value of the applied e.m.f

A vibrator is used to generate ripples in a ripple tank. If the distance between two successive troughs is 3.5cm and the wave travels a distance of 31.5cm in 1.5s. calculate the frequency of the vibrator.

The speed of light in medium A of refractive index is 1.5 is 2.0 X 10^8 ms^-1. Determine the speed of light in medium B of refractive index is 1.2

The wavelength of a sound note travelling with a speed of 360 m^s-1 is 600m, determine the period of the note

In which of the following levers is the effort applied between the load and the fulcrum?

The current passing through 6Ω the is 1.5A . Calculate the current in the 3 Ω resistor.

calculate the terminal p.d of the battery in the diagram

Which of the statements is correct about the nucleus of an atom? I. It is centrally located in the atom II. contains the nucleons and electrons III. is positively charged due to the protons IV. decays when there is instability in it

A radioactive element of mass of 16g was isolated and stored. It was discovered that after 40 days only 1g of the element remained undecayed. Calculate the half-life of the element.

Which of the following reasons explains why the walls and ceilings of a standard concert hall are usually covered with perforated pads? To

A bucket of water of mass 10kg is swung in a vertical circle of radius 1.2m.While at the lowest position of the swing, its speed is 5 ms^-1. Determine the tension in the string ( g= 10 ms^-2)

A man's near point is 30cm. Which of the following eye defects is he most likely to suffer from?

White light can be produced by a combination of I. magenta, yellow and cyan II. red, blue and green III. magenta and green IV. yellow, red and green

The diagram below shows a beam of light incident on a mirror. Such a mirror can be used as

Which of the following statements about stationary wave is not true?

In a pipe closed at one end and open at the other end, the overtones that accompany the fundamental frequency are

A radioactive substance of mass 512.0g decays to 64.0g. determine the number of half life involve in the

Two waves will interfere destructively if the path difference between the waves is

Which of the following statements about a step up transformer is correct?

The unit of magnetic flux density is

Meters are installed in houses to monitor and evaluate the cost of the electricity consumed. What physical quantity does this meter measure?

The type of energy stored by a dry cell is

The microphone transforms energy from

A hospital received 16g of a radioactive substance at 1300 hour GMT. At 1700 hour GMT, the fraction of the substances left undecayed was 1

Which of the following situations pertains to Newton's third law of motion?

The distance and velocity of a system are each reduced simultaneously by one-half. The power of the system is

A plane is inclined at 45 degree to the horizontal. Calculate the velocity ratio of the plane.

A body in a lift is moving down with acceleration due to gravity. Which of the following statements is correct? The body

When the pressure in oil increased, the viscosity of the oil would be

The ice and steam points of a resistance thermometer are 12 ohms and 20.0 ohms respectively. Calculate the resistance of the thermometer at

A radium nuclide decays by emitting alpha particles as shown below:

A beam of light which appears to come from a point in space is said to be

A sound wave made up of a large number of unrelated frequencies superimposed on each other is called

A boy pushes a box of mass 80kg along a horizontal floor with a force of 200N. If the box is pushed with a uniform velocity, what is the coefficient of friction between the box and the floor? { g = 10 ms^-2}

Extremely thin wires can be drawn from platinum simply because platinum is

The S.I unit of inductance is