JAMB UTME - Physics - 1980
Pregunta 1 Informe
The relative densities of zinc, brass, copper, gold and silver are respectively 7.1, 8.5, 8.9, 19.3, 10.5. A metal ornament which weighs 0.425kg and can displace 50 x 10-6m3m of water is made of
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Pregunta 3 Informe
An object of mass m and volume v, is totally immersed in a liquid of density p. The tension of a string holding it is
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Pregunta 4 Informe
In the diagram above, MN is perpendicular to ON and MR what is the difference between the moment about N of the force of 20 Newtons applied along MP an its moment about 0
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Pregunta 5 Informe
A quantity of sungas at -133 occupies 1/3m3 under pressure 1.4 x 105 Nm-2. if the gas occupies 31 m-2 at 37oC, its pressure will be
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Pregunta 6 Informe
Which of the following statements are true in the structure of atoms?
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Pregunta 8 Informe
A man stands one-third of the way between two walls and claps his hands, He hears two distinct echoes 1s apart. If the speed of sound is 330ms-1 the distance between the wall is
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Pregunta 10 Informe
The name given to the characteristics behaviour of substances which set their length perpendicular to a strong magnetic field instead of in line with it is
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Pregunta 11 Informe
What is the relative permitivity of a capacitor if its capacitance with a medium as dielectric is 16 farads and its capacitance with vacuum as dielectric is 2 farads?
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Pregunta 12 Informe
In sunlight, a blue flower looks blue because we see the flower by the light it
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Pregunta 13 Informe
The best material for the core of the primary and secondary coils of an induction coil is
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Pregunta 16 Informe
A magnet is similar to a bipolar charged system in that
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Pregunta 17 Informe
In the process of electrification by induction, the amount of induced charge in relation to the inducing charge is the
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Pregunta 18 Informe
If the magnification of a virtual image formed of an object 10cm from a convex lens is 3, then the focal length of the lens is
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Pregunta 19 Informe
A cell has an open circuit voltage V1 and a closed circuit voltage V2 when a current is flowing through it. Therefore, the internal resistance of the cell is
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Pregunta 20 Informe
Which of the following radiations cannot be deflected by a magnetic field?
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Pregunta 21 Informe
Which of the following statements on the use of X-rays is incorrect? X-rays are used
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Pregunta 22 Informe
What is the acceleration of a particle whose motion is graphically displayed in the diagram above
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Pregunta 23 Informe
The motion of the moving skin of a talking drum can rightly be described as
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Pregunta 24 Informe
In the diagram above, a ray of light passes from glass into air, if the angle of incidence in glass is a and angle of refraction in air is \( \beta \) which of following statements is true???
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Pregunta 25 Informe
Which of the following statements about sound is NOT true?
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Pregunta 26 Informe
the ratio of the linear expansivity of copper to that of iron is approximately 1.5. A specimen of iron and a specimen of copper expands by the same amount per unit rise in temperature. The ratio of their length is
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Pregunta 28 Informe
A stand-by generator is connected to fifteen 40 W lamps and musician's 600 W amplifying system. How much energy is used if the generator runs for 6 hours?
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Pregunta 29 Informe
A given quantity of heat increases the temperature of 150grams of water from 9oC to 15oC and increases the temperature of oil of 100grams from 9oC to 25oC. The ratio of the specific heat of oil to that of water is
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Pregunta 30 Informe
Which of the following statements is NOT true of the image in a plane mirror? The image is
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Pregunta 32 Informe
In the study of physics, temperature and heat are often confused with each other. Which of the following statements correctly defines these two element?
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Pregunta 33 Informe
a pressure cooker saves both time and fuel in cooking because inside the cooker, the
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Pregunta 34 Informe
A milliameter of resistance 5\(\Omega\) and full scale deflection of 5m A is to used to measure a potential difference of 50 V. The resistance of the multiplier should be
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Pregunta 35 Informe
The water at the bottom of a waterfall is slightly warmer than that at the top because part of the
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Pregunta 36 Informe
Which of the following statements are true of the law of universal gravitation?
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Pregunta 37 Informe
Heat is supplied to a block of ice 0o until half of it has melted. Which of the following statements is true?
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Pregunta 38 Informe
a calorimeter of thermal capacity 80j contains 20g of water at 25oC. Water at 100oC is added so that the final temperature of the set-ups is 50oC. The amount of water added is (Heat capacity of water = 4.18J/g/oC)
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Pregunta 39 Informe
Which of the following is true of an electrical charge?
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Pregunta 40 Informe
which of the following does NOT cause a reduction of the surface tension of water?
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Pregunta 41 Informe
Which of the following elements is the best absorber of X-rays?
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Pregunta 43 Informe
Which of the following physical quantities is NOT a vector?
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Pregunta 44 Informe
A tugboat is travelling from Asaba to Onitsha across the River Niger with a resultant velocity of 20 knots. If the river flows at 12 knots, the direction of motion of the boat relative to the direction of water flow is
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Pregunta 45 Informe
Any line or section through an advancing wave in which all the particles are in the same phase is called the
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Pregunta 47 Informe
If the volume of a fixed mass of a gas is kept constant, the pressure of the gas
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Pregunta 48 Informe
Given that SQ = 10cm and SP = 6cm, the refractive index of a block of glass shown above is
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