JAMB UTME - Physics - 1978
Tambaya 4 Rahoto
The statements below were made by some students describing what happened during the determination of the melting point of solids.
i. the temperature of the solid was solid until melting started
ii. the temperature of the solid rose until melting started
iii. during melting, the temperature was rising
iv. during melting, the temperature was constant
v. the temperature continued to rise after all the solid had melted
vi. the temperature stopped rising after all the solid had melted. Which of the following gives correct statements in the right order?
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Tambaya 5 Rahoto
A solid suspended by a piece of string is completely immersed in water. On attempting to lift the solid out of the water, the string breaks when the solid is partly out of the water. This is because
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Tambaya 6 Rahoto
An air force jet flying with a speed of 335ms-1 went past an anti-aircraft gun. How far is the aircraft 5s later when the gun was fired?
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Tambaya 7 Rahoto
A temperature 20oC is the same as
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A potential difference of 6v is used to produce a current of 5A for 200s through a heating coil. The heat produced is
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Tambaya 10 Rahoto
Three 5 ohms resistors connected in parallel have a potential difference of 60v. applied across the combination. The current in each resistor is
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Tambaya 11 Rahoto
Which of the following is true for the image formed by a convex mirror? i. the image is always virtual ii. the image is always erect iii. the image lies between pole and focus iv. the image is never magnified v. the focus length is negative
Tambaya 13 Rahoto
A herdsman yelling out to fellow herdsman heard his voice reflected by cliff 4s later. What is the velocity of sound in air if the cliff is 680m away?
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Tambaya 14 Rahoto
Why is it impossible for the lines of force of an electric field to cross one another?
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Tambaya 15 Rahoto
An ice cube floats in a glass of water filled to the brim. What happens when the ice melts?
Tambaya 16 Rahoto
The internationally agreed system of units(SI) for physical measurements are
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The latent heat of fusion of ice is 80cal g-1. How much heat is required to change 10g of ice at QoC into water at the same temperature?
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Tambaya 18 Rahoto
A gas at pressure PN-m-2 and temperature 27oC is heated to 77oC at constant volume. The new pressure is
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Tambaya 21 Rahoto
Two lamps are rated 40W and 220V each are connected in series. The total power dissipated in both lamps is
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Tambaya 22 Rahoto
The amount of heat required to raise the temperature of a body is
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Two resistors R1 and R2 are connected in parallel, R2 being greater than R1. The combined resistance is
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Tambaya 24 Rahoto
A palm fruit dropped to the ground from the top of a tree 45m tall. How long does it take to reach the ground? (g = 10ms-2)
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Tambaya 27 Rahoto
For the correction of myopic defects in the human eye we require
Tambaya 29 Rahoto
A machine gun with a mass of 5kg fires a 50g bullet at speed of 100ms-1. The recoil speed of the machine gun is
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Tambaya 30 Rahoto
Every house supplied with electricity is provided with a box of fuses so that
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Tambaya 31 Rahoto
To determine the weight of an object you could
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an object 1cm high placed on the axis 15cm from a converging lens forms an image 30cm from the lens. The size of the image is
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Tambaya 33 Rahoto
mercury is a better barometric fluid than water because i. it needs no colouring ii. its density is many times greater than that of water iii. it does not wet glass iv. it has a high vapour pressure v. it has a high boiling point. which of the above statements are true?
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Tambaya 34 Rahoto
The boys are communicating with each other by stretching a string passing through a hole punched in the bottom of each of two tin cans. The physical principle employed is that sound travels
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Tambaya 35 Rahoto
The net charge on the atom is zero because
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A few grains of table salt were put in a cup of water, kept at constant temperature and left undisturbed. Eventually all the water tasted salty. The action is due to
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Tambaya 38 Rahoto
In a D.C. circuit, a 10 microfarad (mf) capacitor is placed in series with a 10 0hm resistor. The total resistance of the combination is
Tambaya 39 Rahoto
A magnet is moved through a coil of wire. The e.m.f. produced in the wire depends on
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The factional force between two bodies
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The force required to make an object of mass m, travelling with velocity v, turn in a circle of radius r is
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Tambaya 48 Rahoto
A piece of rubber 10cm long stretches 6mm when a load of 100N is hung from it. What is the strain?
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Tambaya 49 Rahoto
The electric supply from Kainji Dam is transmitted at high voltages of the order hundreds of kilovolts but is converted to domestic use of about 220 volts by
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