JAMB Physics 2007 Past Questions

The unit of moment of a couple can be expressed in?

A gramophone record takes 5s to reach its constant angular velocity of 4\(\pi\) rads^-1 from rest. Find its constant angular acceleration.

A car of mass 1500 kg goes round a circular curve of radius 50m at a speed of 40 ms^-1. The magnitude of the centripetal force on the car is ?

Two spheres of masses 5.0 kg and 10.0 kg are 0.3 m apart. Calculate the force of attraction between them?


[G = 6.67 X 10^-11 Nm² Kg²]

A machine has a velocity ratio of 4. if it requires 800 N to overcome a load of 1600 N,what is the efficiency of the machine?

A reservoir 500 m deep is filled with a fluid of density 850 kgm^-3. If the atmospheric pressure is 1.05 x 10⁵ Nm^-2, the pressure at the bottom of the reservoir is.


[g = 10ms^-2]

A piece of iron weights 250 N in air and 200 N in a liquid of density 1000 kgm^-3. the volume of the iron is?

A clinical thermometer is different from other mercury in glass thermometers owing to

I. Use a liquid with a high melting point.
II. use a liquid of high volume expansivity.
III. use a capillary tube of large diameter.

which of the above best describes how the sensitivity of a liquid-in-glass thermometer can be enhanced?

2 kg of water is heated with a heating coil which draws 3.5 A from a 200 V mains for 2 minutes. what is the increase in temperature of the water?


[specific heat capacity of water = 4200 jkg ^-1k^-1]

I. Increase the melting point of the liquid.
II. Increase the boiling point of the liquid.
III. Decrease the melting point of the liquid.
IV. Decrease the boiling point of the liquid.
which of the statement above about the effect on increase in pressure in a liquid are correct?

I. Mass
II. Density
III. Temperature
IV. Nature of substance
which of the above affect diffusion?

The blade of a hoe feel colder to touch in the morning than the wooden handle because the

I. They should be identical
II. They should originate from the same source.
III. They should be coherent.
IV. They should be monochromatic.
from the statements above, the conditions for two waves to interfere are?

In a large telecommunications auditorium, perforated absorbent materials are used to line the ceiling so as to

The phenomenon of light bending round an obstacle is?

The instrument used by designers to obtain different color pattern is called?

A glass plate 0.9cm thick has a reflective index of 1.50. how long does it take for a pulse of light to pass through the plate?


[c = 3.0 x ⁸ ms^-1]

When an object is placed between the principal focus and the optical center of a convex lens, it could be used as a?

The production of pure spectrum could easily be achieved using a?

A charge 50 µc has electric field strength of 360 NC^-1 at a certain point. The electric field strength due to another charge 120 µc kept at the same distance apart and in the same medium is?

The energy E of a photon and it's wavelength are related by Eλ = X. the numerical value of X is?


[h = 6.63 x 10^-34js, c = 3 x 10⁸ ms^-1]

The bond that forms a semiconductor is?

Silicon doped with aluminum and germanium doped with arsenic become?

The figure above shows 4 forces 3N, 10N, 3√3N and 6N acting on a particle P. The resultant of he four forces is

From the diagram above, the bob of the pendulum has the fastest speed at

In the diagram above, a rod 50 cm long of uniform cross-section is suspended horizontally on a fulcrum, F, by the action of two forces. What is the weight of the rod?

A boy drags a bag of rice along a smooth horizontal floor with a force of 2N applied at the angle of 60^o to the floor. The work done after a distance of 3m is

A blacksmith heated a metal whose cubic expansivity is 6.3 x 10^-6K^-1. The areal expansivity is

The ratio of the coefficient of linear expansion of two metals ^∝₁/_∝2 is 3:4. If, when heated through the same temperature change, the ratio of the increase in length of the two metals, ^e₁/_e2 is 1:2, the ratio of the original lengths ^l₁/_l2 is

The fundamental frequency of a plucked wire under a tension of 400N is 250Hz. When the frequency is changed to 500 Hz at constant length, the tension is

Three cells each of e.m.f 1.5 V and internal resistance 2.5Ω are connected as shown in the diagram above. Find the net e.m.f and the internal resistance

In the diagram above , if the magnetic field points into the paper and the force on a current - carrying conductor points upwards, what is the direction of the current?

The instantaneous value of the induced e.m.f as a function of time is ε = ε_o sin ωt where ε_o is the peak value of the e.m.f. The instantaneous value of the e.m.f., one quarter of the period is

During the nuclear reaction described by

235	W →	235	X→	231	Y
92		93		91

the particles emitted are respectively

from the diagram above, the inductive reactance and the resistance R are respectively

118.8cm² surface of the copper cathode of a voltameter is to be coated with 10^-6m thick copper of density 9 x 10³kgm^-3. How long will the process run with 10A constant current?
[3.3 x 10^-7kgC^-1]

A particle of weight 120N is placed on a plane inclined at 30⁰ to the horizontal. If the plane has an efficiency of 60% to the floor what is the force required to push the weight uniformly up the plane?

A string of length 4m is extended by 0.02m when a load of 0.4kg is suspended at its end. What will be the length of the string when the applied force is 15N?

Which of the following gas laws is equivalent to the work done?

The difference observed in solids, liquids and gases can be accounted for by

If two charged plates are maintained at a potential difference of 3 kv, the work done in taking a charge of 600µc across the field is

A conductor has a diameter of 1.00mm and length of 2.00m. If the resistance of the material is 0.1Ω, the resistivity is

A 40KW electric cable was uses to transmit electricity through a resistor of resistance 2.00Ω at 800V. The power loss as internal energy is

The instrument that measures both ac and dc is called

two long parallel wires X and Y carry currents 3A and 5A each. if the force experienced by unit length is 5 x 10^-5N. the force per unit length experienced by wire Y is

Lenz's law is a law of conservation of

A 120V, 60W lamp is to be operated on 220V ac supply mains. calculate the value of non inductive resistance that would be required to ensure that the lamp is run on correct value

A radioactive substance has a half life of 20 days. What fraction of the original radioactive nuclei will remain after 80 days?