1993 JAMB UTME Physics Past Questions

1993

A radioactive substance has a half-life of 20 hours. What fraction of the original radioactive nuclei will remain after 80 hours?

1993

The external and internal diameter of a tube are measured as (32 ± 2)mm and (21 ± 1)mm respectively. Determine the percentage error in the thickness of the tube.

1993

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

1993

A plane inclined at angle \(\theta\) has a velocity ratio of 10 : 1. The inclination of the plane to the horizontal is given by

1993

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

1993

The force experienced by an object of mass 60.0kg in the moon's gravitational field is 1.002 x 102N. What is the intensity of the gravitational field?

1993

A rocket burns fuel at the rate of 10kgs-1 and ejects it with velocity of 5 x 103ms-1. The thrust exerted by the gas on the rock is

1993

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

1993

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

1993

A metal rod 800mm long is heated from 10oC to 95oC. If it expands by 1.36mm, the linear expansivity of the metal is

1993

The thermometric properties of the thermocouple is that is

1993

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

1993

A weightless vessel of dimensions 4m x 3m x 2m is filled with a liquid of density 1000kgm-3 and sealed. What is the maximum pressure this container can exert on a flat surface? [g = 10ms-2]

1993

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

1993

Which of the following waves can propagate through a vacuum?

1993

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

1993

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

1993

200g of water at 90oC is mixed with 100g of water at 30oC. What is the final temperature?

1993

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

1993

A beam of light is incident from air to water at an angle of 30oC. Find the angle of refraction if the refractive index of water is \(\frac{4}{3}\)

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