JAMB Physics 1992 Past Questions

What is the least possible error in using a rule graduated in centimeters?

Which of the following affects the period of a simple pendulum? i. mass of the pendulum bob. ii. length of the pendulum. iii. acceleration due to gravity.

A boy sits in a train moving with uniform speed on a straight track. If from his outstretched palm he gently tosses his coin upwards, the coin will fall

A body starts from rest and moves with uniform acceleration of 6ms^-2. What distance does it cover in the third seconds

A stone, Q is thrown with velocity U at an angle of 75^o to the horizontal. Another stone R is thrown with the same velocity U but with an angle of 15^o to the horizontal. The ranges covered by the stones will be

A man weight 800N climbs up a stairs to height of 15m in 12.5s. What is the man''s average power output?

A machine requires 1000J of work to raise a load of 500N through a vertical distance of 1.5m. Calculate the efficiency of the

In an experiment to determine Young's Modulus for a wire, several loads are attached to the wire and the corresponding extension measured. The tensile stress in each case depends on the

If a plastic sphere floats in water (density = 1000kgm³) with 0.5 of its volume submerged, and floats in oil with 0.4 of its volume submerged the density of the oil is

A platinum resistance thermometer wire has a resistance of 5 ohms at 0^oC and 5.5 ohms at 100^oC. Calculate the temperature of the wire when the resistance is 5.2 ohms

A bridge made of steel is 600m long. What is the daily variation in its length if the night-time and daytime temperatures are 10^oC and 35^oC respectively. The linear expansivity of steel is 0.000012C^-1

One of the most important applications of bi-metallic strip is found in the construction of

At constant pressure, the density of a fixed mass of gas is

How much heat is absorbed when a block of copper of mass 0.05kg and specific heat capacity 390Jkg^-1K^-1 is heated from 20^oC to 70^oC?

A block of ice floats on water inside a container. If the block of ice gets completely melted, the level of water in the container will

The space between the double glass walls of a thermos flask is evacuated space are silvered. The residual source of heat loss takes place by

The equation of a wave is y = 0.005 sin[x(0.5X - 200t)] where x and y are in meters and t is in seconds. What is the velocity of the wave?

Which of the following characteristics of a wave is used in the measurement of the depth of the sea?

A note is the octave of another note if it has

What is the frequency of the sound made by a siren having a disc with 32 holes and making 25 revolution per seconds?

Which of the following properties make the convex mirror useful as a driving mirror? i. the image is real. ii. the image is erect. iii. it has a wide field of view. iv. the image is magnified.

When an object is placed very close to the pole of a concave mirror, the virtual image obtained is

A concave mirror has a radius of curvature of 36cm. At what distance from the mirror should an object be placed to give a real image three times the size of the object?

Which of the following statements is CORRECT about a long-sighted boy who does not put on glasses?

The speed of light in air is 3 x 10⁸ms^-1. What is the speed in glass with a refractive index of 1.50?

If the refractive index of a medium in air is 2.0, what is the critical angle for this medium?

Which of the following arrangements of the components of electromagnetic spectrum is in ascending order of wavelengths?

The angle between the direction of the earth's magnetic field and the horizontal is called the

Calculate the force acting on an electron of charge 1.6 x 10^-19C placed in an electric field of intensity 10⁸Vm^-1

When an ebolite rod is rubbed with fur, it has

Which of the following factors has no effect on the e.m.f. of a primary cell?

A wire of length 15m made of a material of resistivity 1.8 x 10^-6\(\Omega\)m has a resistance of 0.27\(\Omega\). Determine the area of the wire

A 5-v battery is connected across the plates of a 2.0\(\mu\)F uncharged parallel plate capacitor. The charge on the capacitor after a long time is

Which of the following apparatus will require the smallest fuse rating for its protection?

The heat produced in a conductor carrying an electric current is

The maximum permissible current through a galvanometer G of internal resistance 10\(\Omega\) is 0.05A. A resistance R is used to convert G into a voltmeter with a maximum reading of 100V. Find the value of R and how it is connected to G

In alternating current theory, the units of impedance, r.m.s. voltage and resonance frequency are respectively equal to

In A.C circuit theory, the root means square (r.m.s) current, I_rms and the peak (maximum)current I_o are related by

The threshold of frequency for photoelectric effect depends on the

After three half lifes, the fraction of a radioactive material that has decayed is

\(^{27}_{13}Al\) + \(^{1}_{0}n\) \(\Rightarrow\) \(^{24}_{11}Na\) + X

A uniform light rod is kept in horizontal equilibrium under the influence of fore forces as shown above, which of the following equations correctly represents the condition of equilibrium for the rod

In the diagram above, the hanging mass m2 is adjusted until m1 is on the verge of sliding. The coefficient of static friction between the mass m1 and the table is

The fig above shows the heights of two liquids X and Y when some air is sucked out of the apparatus through the pump P. The diameter of the table in X is twice That of the Tube In Y. What is the relative density of the liquid X with respect to liquid Y

The diagram above represents the field pattern obtained by bringing the poles of two magnets together.The poles must be

The diagram above shows a meter bridge in which two of thee arms contain resistances R and 2Ω. A balance point is obtained at 60cm from the left end , calculate the value of R

The circuit diagram above contains four ammeters W, X, Y and Z, Which of the following statements about the ammeter readings is correct

A capacitor of 10µF is connected across a cell of 12 volts as shown above, calculate the energy stored in the capacitor

PQRS is rectangular cell with PQ perpendicular to the magnetic field as shown above. If a current flows in the the direction PQRS in what direction will the coil move