JAMB Physics 1993 past questions

Which of the following quantities has the same unit as the watt?

1cm 2cm 5cm What is the reading of the vernier capilers shown above?

If it takes 5.0 hours to drain a container of 540.0 cm3 of water, what is the flow rate of water from the container in kgs-1?

Two forces of magnitudes 7N and 3N act at right angles to each other. The angle è between the resultant and the 7N force is given by

An object is projected with velocity of 80 ms-1 at an angle of 30o to the horizontal. The maximum height reached is

An earoplane lands on a runway at a speed of 180kmh-1 and is brought to a stop uniformly in 30 seconds. What distance does it cover on the runway before coming to rest

Which of the following is TRUE of a particle moving in a horizontal circle with constant angular velocity?

The force experienced by an object of mass 60.0kg in the moon’s gravitational field is 1.002 x 103 N. What is the intensity of the gravitational field?

Which of the following correctly describe the energy changes in the generation of light by a hydroelectric power station?

In the diagram above, a lever of length 200m is used to lift a load of mass 180kg. The pivot at P is 120m from the load. What minimum force, F1 must be applied at the end of the lever?

An object of mass 400g and density 600 kgm-3 is suspended with a string so that half of it if immersed in paraffin of density 900 kgm-3. The tension in the string is

The thermometric property of the thermocouple is that its

When the volume of a given mass of gas in halved and its temperature doubled, the pressure

200g of water at 900C is mixed with 100g of water at 300C. What is the final temperature?

The melting point of a solid is given at 800C. if 105J of heat energy is required at this temperature to melt 10g of the solid, the specific latent heat of fusion of the solid is

The relationship between L and the wavelength ë of the stationary wave is

Determine the distance between the consecutive antinodes XX if the wavelength is 66cm.

Which of the following waves can propagate through a vacuum?

Radio waves emitted from an antenna are picked up by a radar after reflection from an aircraft in 4 x 10-ss. How far is the aircraft from the antenna? [c = 3 x 108 ms-1]

Which of the following expressions gives the linear magnification produced by a concave mirror of radius of curvature r, if u and v are the object and image distances respectively?

If the focal length of a camera lens is 20cm, the distance from the film at which the lens must be set to produce a sharp image of an object 100cm away is

Which of the following may be used to explain a mirage? I Layers of air near the road surface have varying refractive indices in hot weather II Road surfaces sometimes becomes good reflectors in hot weather. III Light from the sky can be reflected upwards after coming close to the road surface.

The property of the eye known as its power of accommodation is controlled by the

Which of the following correctly explains(s) why a green leaf appears green in bright daylight? I It absorbs only the green component of sunlight. II It absorbs all colours in sunlight except green. III It reflects only the green component of sunlight.

Which of the following correctly explain(s) why soft iron is preferred to steel in electromagnets? I Soft iron is more readily magnetized than steel. II Soft iron is more readily demagnetized than steel. III Soft iron retains magnetism more than steel.

The terminal voltage of a battery is 4.0V when supplying a current of 2.0A, and 2.0V when supplying a current of 3.0A. The internal resistance of the battery is

The current 1 in the figure above is

In the network shown above, determine the potential difference across the 5ìF capacitor.

A 40-W instrument has a resistance of 90 ohms. On what voltage should it be operated normally?

The primary aim in high tension transmission is to

Determine the inductive reactance when a 30.0mH inductor with a negligible resistance is connected to a 1.30 x 103 Hz oscillator.

Which of the following statements correctly describe(s) cathode rays? I They consist of tiny particles negative electric charges II They are deflected in a magnetic field but not in an electric field III They consist of fast moving neutrons and deflected in an electric field.

The threshold frequency for photoelectric effect depends on the

Which of the following are produced after a nuclear fusion process? I One heavy nucleus II Neutrons III Protons IV Energy

After three half life, the function of a radioactive material that has decayed is

An element X of atomic number 88 and mass number 226 decays to form an element Z by emitting two beta particles and an alpha particles. Z is represent by

The kinetic energy of a photoelectron liberated from a metallic surface depends on the