JAMB UTME - Physics - 1999

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;

Specific heat capacity of copper = 400JKg-1K-1

Latent heat of fusion of ice = 3.3 x 105JKg-1

The diagram above shows the prism arrangement in a

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

In the series a.c circuit shown above, the p.d across the inductor is 8Vr.m.s and that across the resistor is 6Vr.m.s. The effective voltage is

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

In the diagram above, if the internal resistance of the cell is zero, the ration of the powers P1 and P2 dissipated by R1 and R2

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

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

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

The diagram above shows 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

The equation of a wave travelling along the positive x-direction is given by;

Y = 0.25 x 10-3 sin (500t - 0.025x).

Determine the angular frequency of the wave motion.

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

2311Na + Proton → pqX + alpha particle

What are the values of p and q respectively in the equation above?

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?

The figure above represents a frictionless pulley system in which a weight W is in equilibrium with a weight of 40N. Find the value of W.

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

The diagram above shows a solid figure with base PQ and center of gravity G on a inclined plane. Which of the following statements is correct

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

A solid weigh 10 .00 N in air, 6 N when fully immersed in water and 7 . 0 N when fully immersed in a liquid X. Calculate the relative density of the liquid, X.