JAMB UTME - Physics - 2019

The height at which the atmosphere cases to exist is about 80km. If the atmospheric pressure on the ground level is 760mmHg, the pressure at a height of 20km above the ground level is

\((\rho_m = 13.6g/cm^3\ \rho = 0.00013g/cm^3)\)

Which of the following statements are correct of the production and propagation of waves?

I. vibration produces waves

II. waves transmit energy along the medium

III. the medium through which the wave travels does not travel with the wave

IV. waves do not require any medium for transmission

The following are parts of the eye

I. Retina

II. Pupil

III. Iris

The correct equivalent in the camera in the same order are

The earth's gravitational field intensity at its surface is about

\(G = 6.7 \times 10^{-11}\,\mathrm{Nm^2/kg^2}\), mass of the earth is \(6 \times 10^{24}\,\mathrm{kg}\), radius of the earth is \(6.4 \times 10^6\,\mathrm{m}\), g on the earth = \(9.8\mathrm{m/s^2}\)

A coil X is moved quickly away from the end Y of a stationary metal bar and a current then flows in X as shown above.

Then

Which of the following bodies, each with centre of gravity G, lying on a horizontal table, is/are in unstable equilibrium?

The conductivity of gases at low pressure can be termed as

I. hot cathode emission

II. thermo ionic emission

III. cold cathode emission

IV. Field emission

A train has an initial velocity of 44m/s and an acceleration of -4m/s\(^{2}\). Calculate its velocity after 10 seconds

In which of the points labelled A, B, C, D and E on the conductor shown would electric charge tend to concentrate most

One newton × One meter equals?

A well 1km deep is filled with a liquid of density \(950\text{kg/m}^3\) and \(g = 10\text{m/s}^2\), the pressure at the bottom of the well is

The diagram shows four positions of the bob of a simple pendulum. At which of these positions does the bob have maximum kinetic energy and minimum potential energy

The limiting frictional force between two surface depends on

I. the normal reaction between the surfaces

II. the area of surface in contact

III. the relative velocity between the surfaces

IV. the nature of the surface

The lower fixed part of a faulty thermometer reads 2°C while the upper fixed point is 100°C.

What is the true temperature when the thermometer reads 51°C?

Which of the following media allow the transmission of sound waves through them?

I. air

II. liquid

III. solids

The diagram above represents the stress-strain graph of a loaded wire. Which of these statements is correct?

The resultant capacitance in the figure above is