JAMB Physics 1999 past questions

Two bodies have masse in the ratio 3 : 1. They experience forces which impart to them accelerations in the ratio 2: 9 respectively. Find the ratio of the forces the masses experience.

The diagram above shows the velocity-time graph of a vehicle. Its acceleration and retardation respectively are

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

The diagram above shows a lift pump with valves at P and Q. during a downward stroke of the piston,

In the J – tube above, Y and X are on the same horizontal level and 30cm3 of air is trapped above Y when the atmospheric pressure is 75cm Hg. Calculate the volume of air trapped above Y when 15cm Hg is now poured into the limb above X.

If the stress on a wire is 107 Nm-2 and the wire is stretched from its original length of 10.00cm to 10.05 cm. The young’s modulus of the wire is

I. A liquid boils when its saturated vapour pressure is equal to the external pressure. II. Dissolved substances in pure water lead to increase in the boiling point. III. When the external pressure is increased, the boiling point increases. IV Dissolved substances in pure water decrease the boiling point. Which combination of the above are peculiarities of the boiling point of a liquid?

When the temperature of a liquid is increased, its surface tension

If a sound wave gors from a cold-air region to a hot-air region, its wavelength

The inside portion of part of a hollow metal sphere of diameter 20cm is polished. The portion will [PAGE 75] therefore form a

The equation of a wave traveling along the positive x-direction is given by y = 0.25 x 10-3 sin (500 t – 0.025 x). Determine the angular frequency of the wave motion,

Calculate the mass of ice that would melt when 2kg of copper is quickly transferred from boiling water to a block of ice without heat loss

The diagram above represents a transverse electromagnetic wave traveling with speed 3.0 x 108ms-1. What is the frequency of the wave?

The temperature gradient across a copper rod of thickness 0.02m, maintained a two temperature junctions of 200C and 800C respectively is

The diagram above show a magnet X with its South pole moved along a soft-iron bar PQ in the direction shown. After some time, the poles at P and Q respectively are

Four cells each of e.m.f. 1.5 V and internal resistance of 4 Ohms are connected in parallel. What is the effective e.m.f. and internal resistance of the combination?

In the circuit above, the ammeter reads a current of 5.0 A when R = 8 Ohms and reads 7.0 A when R = 5 Ohms. The value of the unknown resistance X is

An astronomical telescope is said to be in normal adjustment when the

Steel is more suitable for permanent magnet than iron because the former

The diagram above shows the prism arrangement in a

The velocities of flight air and glass are 3.0 x 108ms and 2.0 x 108ms-1 respectively. If the angle of refraction is 300, the sine of the angle of incidence is

In the series a.c. circuit shown above, the p.d across the inductor is 8Vr.m.s. The effective voltage is

The core of an efficient transfoemer should consist of laminated pieces of metal in order to

In Fleming’s right-hand rule, the thumb, the forefinger and the middle finger if held mutually at right angles represent respectively, the

In the circuit above, the potential across each capacitor is 100V. The total energy stored in the two capacitors is

At what frequency would a 10 H inductor have a reactance of 2000 ohms?

A 3000 W electric cooker is to be used on a 200V mains circuit. Which of the fuses below can be used safely with the cooker?

In the diagram above, if the internal resistance of the cell is zero, the ratio of the power P1 and P2 dissipated by R1 and R2 respectively, is

If x is the uncertainty in the measurement of the position of a particle along the x-axis and “Px is the uncertainty in the measurement of the linear momentum along the x-axis, then the uncertainty principle relation is given as

Na + Proton X + alpha particle. What are the values of p and q respectively in the equation above?

In semi-conductors, the carriers of current at room temperature are

What is the speed of a particle of mass 10-27kg whose wavelength is 10-8m?

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

Gamma rays are produced when