JAMB UTME - Physics - 1980
Question 1 Report
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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Question 2 Report
Given that SQ = 10cm and SP = 6cm, the refractive index of a block of glass shown above is
Question 4 Report
a pressure cooker saves both time and fuel in cooking because inside the cooker, the
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Question 8 Report
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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Question 9 Report
Which of the following statements are true in the structure of atoms?
Question 10 Report
The best material for the core of the primary and secondary coils of an induction coil is
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Question 11 Report
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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Question 12 Report
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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Question 13 Report
Which of the following radiations cannot be deflected by a magnetic field?
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Question 14 Report
Which of the following statements is NOT true of the image in a plane mirror? The image is
Question 15 Report
The water at the bottom of a waterfall is slightly warmer than that at the top because part of the
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Question 16 Report
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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Question 17 Report
In the process of electrification by induction, the amount of induced charge in relation to the inducing charge is the
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Question 18 Report
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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Question 19 Report
Which of the following statements are true of the law of universal gravitation?
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Question 22 Report
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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Question 23 Report
If the volume of a fixed mass of a gas is kept constant, the pressure of the gas
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Question 24 Report
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???
Question 26 Report
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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Question 28 Report
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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Question 29 Report
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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Question 30 Report
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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Question 32 Report
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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Question 33 Report
The motion of the moving skin of a talking drum can rightly be described as
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Question 34 Report
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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Question 35 Report
What is the acceleration of a particle whose motion is graphically displayed in the diagram above
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Question 36 Report
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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Question 37 Report
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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Question 38 Report
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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Question 39 Report
Which of the following elements is the best absorber of X-rays?
Question 41 Report
Which of the following statements on the use of X-rays is incorrect? X-rays are used
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Question 42 Report
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
Question 44 Report
The Diagram above shows the prism arrangement in a
Question 45 Report
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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Question 46 Report
In sunlight, a blue flower looks blue because we see the flower by the light it
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Question 47 Report
which of the following does NOT cause a reduction of the surface tension of water?
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Question 48 Report
In a compound microscope
