JAMB Physics 2018 Past Questions

A man walks 1km due east and then 1 km due north His displacement

The density of 400cm of palm oil was 0.9gcm-3 before frying. If the density of the oil was 0.6gm-3 after frying, assuming no loss of oil due to spilling, its new volume was?

Natural radioactivity consists of the emission of

Which of the following is true of an electrical charge?

Which of the following does NOT describe the Image formed by a plane minor?

What is the resultant resistance of the circuit in the image shown?

Which of the following best describes the energy changes which take place when a steam engine drives a generator which lights a lamp?

Cathode rays are

A narrow beam of white light can be split up into different Colours by a glass prism. The correct explanation is that

The diagram shown represents a block-and-tackle pulley system on which an effort of W Newtons supports a load of 120.0N. If the efficiency of the machine is 40, then the value of W is?

What type of reaction is represented by the following scheme?
\(_{1} ^{2} X\) + \(_{1} ^{2} Y\)  -----> \(_{2} ^{3} Z\) + \(_{1} ^{0} n\) + energy

The amount of heat needed to raise the temperature of 10kg of Copper by 1K is its

The electrochemical equivalent of silver is 0.0012g/C. If 36.0g of silver is to be deposited by electrolysis on a surface by passing a steady current for 5mins, the current must be?

Shadows and eclipses result from the

Which of the following obeys Ohm's law?

Which of the following statements are TRUE of isotopes?
I. Isotopes of an element have the same chemical properties because they have the same number of electrons
II. Isotopes of elements are normally separated using physical properties
III. Isotopes of an element have the same number of protons in their nuclei

In the diagram given the hanging mass m2 is adjusted until m1 is on the verge of sliding. The coefficient of static

Which of the following may be used to explain a mirage?
I. Layers of air near the road surface have varying refractive indices in hot weather
II. Road surfaces sometimes become good reflectors in hot weather
III. Light from the sky can be reflected upwards after coming close to the road surface.

In the diagram given if the atmospheric pressure is 760mm, the pressure in the chamber G Is

Which of the following has the lowest internal resistance when new?

The pitch of an acoustic device can be increased by

One of the features of the fission process is that

The linear expansivity of brass is 2 x 10\(^{-5}\) C\(^{-1}\). If the volume of a piece of brass is 15.00cm at 0°C, what is the volume at 100°C

A lead bullet of mass 0.05 kg is fired with a velocity of 200 ms into a lead block of mass 0.95 kg. Given that the lead block can move freely. the final kinetic energy after impact is

In a series R-L-C circuit at resonance, the voltages across the resistor and the inductor are 30V and 40V respectively. What is the voltage across the capacitor?

If the fraction of the atoms of a radioactive material left after 120years is \(\frac{1}{64}\), what is the half-life of the material?  \(\frac{1}{64}\)

The amount of heat needed to raise the temperature of 10kg of Copper by 1K is its

The time rate of loss of heat by a body is proportional to the

A positively charged rod X is brought near an uncharged metal sphere Y and is then touched by a finger with X still in place. When the finger is removed, the result is that Y has

Electrical appliances in homes are normally earthed so that

The process whereby a liquid turns spontaneously into vapour is called

The differences observed in solids, liquids and gases may be accounted for by

Convex mirrors are used as driving mirrors because images formed are

Musical instruments playing the same note can be distinguished from one another owing to the difference in their

In the diagram shown, If the south-poles of two magnets stroke a steel bar, the polarities at T and V will respectively be

In homes, electrical appliances and lamps are connected in parallel because

An object moves in a circular path of radius 0.5m with a speed of 1ms\(^{-1}\). What is its angular velocity?

What effort will a machine of efficiency 90% apply to a load of 180N if its efforts arm is twice as long as its load arm?

Calculate the effective capacitance of the circuit in the diagram given

Which of the following diagrams represents correctly an n-p-n transistor?

i.

ii

iii

choose the option that best completes the gaps. All God’s prophets were given the great…

The inner diameter of a small test tube can be measured accurately using a

A pulley system has three pulleys in the fixed block and two in the movable block and if the pulley has an efficiency of 72%, the mechanical advantage of the system is?

When an atom loses or gain a charge it becomes

A ball of mass 800g moving horizontally with a speed of 5m/s hits a vertical wall and rebounds with the same speed. The impulse experienced by the ball is?

The force between the molecules of a liquid in contact with that of a solid is?

A body of mass 100g moving with a velocity if 10ms-1 collides with a wall. If after collision it moves with a velocity of 2.0ms−1 in the opposite direction, calculate the change in momentum.

A 20kg mass is to be pulled up a slope inclined at 300 to the horizontal. If efficiency of the plane is 75%. The force required to pull the load up the plane is J [g=10ms\(^{− 2}\)]

The tendency of a body to remain at rest when a force is applied to it is called.

An object is placed 20cm from a concave mirror of focal length 10cm. The linear magnification of the image produced is?