OAU Physics 2008/2009 Past Questions

What is the dimension of pressure?

Calculate the length of a displaced pendulum bob that passes its lowest point twice every second. [g = 10ms^-2]

When a ball rolls on a smooth level ground, the motion of its centre is

A vehicle of mass m is driven by an engine of power P from rest. Find the minimum time it will take to acquire a speed v.

A box of mass 40Kg is being dragged along by the rope inclined at 60° to the horizontal. The frictional force between the box and the floor is 100N and the tension on the rope is 300N. How much work is done in dragging the box through a distance of 4m?

A body is projected from the earth's surface with the hope of letting it escape from the earth's gravitational field. What is the minimum escape velocity? [Earth's radius = 6.4 x 103Km, g = 10msv^-2/2p].

A uniform rod PQ of mass 2Kg and length of 1m is pivoted at the end P. if a load of 14N is placed on it at the centre, find the force that should be applied vertically upwards at Q to maintain the rod in equilibrium

The energy contained in wire when it is extended by 0.02m by a force of 500N is

What is the acceleration due to gravity 'g' on the moon, if g is 10ms11.3Kmsv^-2 on the earth?

A 5Kg block is released from rest on a smooth plane inclined at an angle of 30° to the horizontal. What is the acceleration down the plane? [g = 10ms1.67ms^-2]

A rectangular metal block of volume 10^-6m^3 at 273K is heated to 573K, if the coefficient of linear expansion is 1.2 x 10^-5K^-1, the percentage change of its volume is

A temperature scale has a lower fixed point of 40mm and an upper fixed point of 200mm. What is the reading on this scale when thermometer reads 60°C?

A 500Kg car was initially at rest traveled with an acceleration of 5ms^-2, what is its kinetic energy after 4s

The temperature at which the water vapour in the air saturates the air and begins to condense is

The period of a simple pendulum will increase by what factor of its inextensible length increased by a factor of four

An air column 10cm in length is trapped into the sealed end of a capillary tube by a 15cm column of mercury with the tube held vertically. On inverting the tube, the air column becomes 15cm long. What is the atmospheric pressure during the experiment?

An electric cell has an internal resistance of 20. A current of 0.5A was measured when a resistor of resistance 5 ohms was connected across it. Determine the electromotive force of the cell.

The speed of light in air is 3 x 10⁸ms^-1 If the refractive index of light from air to water is 4/3, calculate the speed of light in water.

It is known that an atomic nucleus comprises of positive charged protons. Which of the following also exist in the nucleus?

The silver wall of a vacuum flask prevents heat loss due to

The electromagnetic waves that are sensitive to temperature changes are

Under constant tension and constant mass per unit length, the note produced by a plucked string is 500Hz when the length of the string is 0.90m. At what length is the frequency 150Hz?

Two bodies P and Q are projected on the same horizontal plane, with the same initial speed but at different angles of 30° and 60° respectively to the horizontal. Neglecting air resistance, what is the ratio of range of P to that of Q?

A capacitor of 2.0 x 10^-11F and an inductor are joined in series. The value of the inductance that will give the circuit a resonant frequency of 200KHz is