JAMB UTME - Physics - 1978
Question 1 Report
Two resistors R1 and R2 are connected in parallel, R2 being greater than R1. The combined resistance is
Answer Details
Question 3 Report
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
Answer Details
Question 4 Report
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
Question 5 Report
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?
Answer Details
Question 6 Report
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?
Answer Details
Question 7 Report
An object is positioned between two plane mirrors inclined at right angles to each other. The object is 1 unit distance from each mirror, the number of images formed is
Answer Details
Question 9 Report
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?
Answer Details
Question 10 Report
The net charge on the atom is zero because
Question 11 Report
The factional force between two bodies
Question 12 Report
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
Answer Details
Question 15 Report
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)
Answer Details
Question 16 Report
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
Question 17 Report
A gas at pressure PN-m-2 and temperature 27oC is heated to 77oC at constant volume. The new pressure is
Answer Details
Question 19 Report
Why is it impossible for the lines of force of an electric field to cross one another?
Answer Details
Question 20 Report
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
Answer Details
Question 21 Report
To determine the weight of an object you could
Question 22 Report
For the correction of myopic defects in the human eye we require
Question 23 Report
If NEPA charges 5k per kWhr, what is the cost of operating for 24 hours a lamp required 1A on a 200v line?
Answer Details
Question 24 Report
a guitar string is 75cm long. the wavelength of its fundamental note is
Answer Details
Question 25 Report
The internationally agreed system of units(SI) for physical measurements are
Question 27 Report
An ice cube floats in a glass of water filled to the brim. What happens when the ice melts?
Question 28 Report
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?
Answer Details
Question 29 Report
A potential difference of 6v is used to produce a current of 5A for 200s through a heating coil. The heat produced is
Answer Details
Question 31 Report
A magnet is moved through a coil of wire. The e.m.f. produced in the wire depends on
Answer Details
Question 33 Report
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
Answer Details
Question 37 Report
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
Answer Details
Question 40 Report
Every house supplied with electricity is provided with a box of fuses so that
Answer Details
Question 41 Report
An object is positioned between two plane mirrors inclined at right angles to each other. The object is 1 unit from each mirror. The number of images formed is
Answer Details
Question 42 Report
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?
Answer Details
Question 43 Report
Three 5 ohms resistors connected in parallel have a potential difference of 60v. applied across the combination. The current in each resistor is
Answer Details
Question 45 Report
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
Answer Details
Question 46 Report
A piece of rubber 10cm long stretches 6mm when a load of 100N is hung from it. What is the strain?
Answer Details
Question 47 Report
Two lamps are rated 40W and 220V each are connected in series. The total power dissipated in both lamps is
Answer Details
Question 48 Report
The force required to make an object of mass m, travelling with velocity v, turn in a circle of radius r is
Answer Details
Question 49 Report
The following are some units i. Ns ii. Mm iii. Nm-2 iv. JoK-1. What are the units of latent heat?
Answer Details
Question 50 Report
A man walks 1km due east and then 1km due north. His displacement is
Answer Details
