JAMB Physics 2004 past questions

In which of the following material media would sound travel faster?

What happens to the rays in a parallel beam of light?

If u is the object distance and v the image distance, which of the following expressions gives the linear magnification produced by a convex lens of focal length f?

The pitch of a sound note depends on

If the angle between two vectors P and Q is 00, the vectors are said to

As the pressure of a fluid increase, its viscosity

I. Jet-propelled aircraft II Rocket propulsion III The recoil of a gun IV A person walking Which of the above is based on Newton’s third law of motion?

In a hydraulic press, a force of 40N is applied on the effort piston area 0.4m2. If the force exerted on the load piston is 400N, the area of the large piston is [PAGE 95]

The earth is four times the size of the moon and the acceleration due to gravity on the earth is 80 times that on the moon. The ratio of the mass of the moon to that of the earth is

The diagram above shows forces 4N, 6N, 10N and 8N which act at a point O in directions indicated. The net horizontal force is

The binding energy of helium 4 2He is

In a tuned radio receiver R, L, C series circuit for resonance, the inductive and capacitive reactance XL and XC respectively are related as

The particle and wave nature of matter are demonstrated in the equation

For semiconductors to have negative temperature coefficient of resistance implies that

Fluorescent tubes produce light by the

In a reverse biased junction diode, current flows in by

The energy stored in an inductor of inductance 5mH when a current of 6A flows through it is

X-rays can be used in the study of crystal structures because they

An a.c. circuit of e.m.f. 12V has a resistor of resistance 8 Ohms connected in series to an inductor of inductive reactance 16 Ohms and a capacitor of capacitive 10 Ohms. The current flow in the circuit is

Transverse waves can be distinguished from longitudinal waves using the characteristic of

When left in a freezer, a bottle full of water cracks on freezing into ice because of the

The change in volume when 450kg of ice is completely melted is

If a force of 50N stretches a wire from 20m to 20.01m, what is the amount of force required to stretch the same material from 20m to 20.05m?

Tea pots are often silver-coated to prevent hear loss by

Metal rods of length 20cm each are laid end to end to form a bridge at 250C. What gap will be provided between consecutive rails for the bridge to withstand 750C?

A 50W electric heater is used to heat a metal block of mass 5kg. If in 10minutes, a temperature rise of 120C is achieved, the specific heat capacity of the metal is

I. Wavelength II Medium of propagation III Wave velocity IV Frequency V. Energy Which of the above are used for characterizing waves?

The instrument used for securing a large number of similar charges by induction is called

If 16mA of current flows through a conductor in one second, the number of electrons transported per second is

The difference between x-rays and gamma rays is that

In the diagram above, the ratio of the electric power dissipated in the 6 Ohms and 3 Ohms resistors respectively is

To protect a material from the influence of an external magnetic field, the material should be kept in a

Which of the following is an electrolyte?

Given three capacitors 0.3uF, 0.5 uF and 0.2 uF, the joint capacitance when arranged to give minimum capacitance is