JAMB Physics 1986 past questions

Which of the following represents the correct precision if the length of a piece of wire is measured with a metre rule?

Which of the following units is equivalent to kg ms-1?

Which of the following is a derived unit?

Two objects, one having three times the mass of the other, are dropped at the same time from at tall building. When they are above the ground, the two objects will have the same

Which of the following assumptions is made in a simple pendulum experiment? The

10cm Q R P 10g Fig. 2 A uniform metre rule QR is balanced on a knife edge which is 55cm from R. when a mass of 10g is hung at P as shown in Fig. 2, the mass of the metre rule is

F1 10.0N F2 O 5.0N F3 Fig. 3 In Fig. 3, the forces F1, F2, F3, acting at O are in equilibrium. If the magnitude of F1 , is 10.0N and the magnitude of F2 is 5.0N, find the magnitude of F3.

When a box of mass 400g is given an initial speed of 5m s-1, it slides along a horizontal floor a distance of 3m before coming to rest. What is the coefficient of the kinetic friction between the box and the floor? (g = 10m s-2)

W N 1200N Figure 4 represents a block-and-tackle pulley system on which an effort of W Newtons supports a load of 120.0N. If the efficiency of the machine is 400, then the value of W is

A 1000kg elevator is descending vertically with an acceleration of 1.0ms-2, if the acceleration due to gravity is 10.0m 5s, the tension in the suspending cable is

The mode of heat transfer which does not requires material medium is

The expansion of solids can be considered a disadvantages in the

Te m p era tu re © 5 10 Time (min) Fig.5 In an experiment in which molten naphthalene is allowed to cool. The cooling curve in Fig. 5 was obtained. The temperature 800C is known as the

The specific latent heat of fusion of lead is the amount of heat required to

Which of the following is common to evaporation and boiling? They

Mercury is suitable as a barometric fluid because it

Which of the following properties makes metals ideal for cooking utensils?

When two objects P and Q are supplied with the same quantity of heat, the temperature change in P is observed to be twice that of Q. The mass of P is half that of Q the ratio of the specific heat capacity of P to Q is

Which of the following is true of sound?

Reflected ray 60o Incident ray AIR Glass Refracted Ray In Fig. 6, a ray of light in air strikes a glass plate at an angle of incidence of 600C. The reflected ray is observed to be perpendicular to the refracted ray. What is the refractive index of the glass?

In which of the following arrangements is the wavelength in an increasing order?

If the refractive index of glass is 1.5, what is the critical angle at the air-glass interface?

What is the effect of the increase in the size of the hole of a pin-hole camera on the image? It

Which of the following is true of the loudness of sound? It

The vibration of an air column produces the sound in the

E Fig. 8. In Fig. 8, E is an accumulator with negligible internal resistance. If the e.m.f. is 9.0V, then the total current is

12V Fig. 6. In Fig. 9, the value of R is

Which of the following if NOT a part of the a.d.c. electric motor?

Which of the following is stored by a dry Leclanche cell?

Which of the following is true of magnetism?

The angle between the magnetic meridian and the geographic meridian at a locality on the earth is the

Which of the following features is NOT a characteristic of natural radioactivity?

The wavelength of ultraviolet radiation is 400nm. If the speed of light in air is 3 x 108m s-1, then the frequency of the ultraviolet radiation is

Which of the following is most strongly deflected by a magnetic field?