JAMB Physics 2015 Past Questions

Practice each question, then open it to see the full details.

If the volume of a gas is recoded as 76cm³ at a temperature of 27°C with a pressure of 800mmHg. What will be the volume of the gas at S.T.P?

A.36.2cm³
B.25.7cm³
C.72.8cm³
D.24.3cm³
E.

Boyle’s law may be Witten as

A.P1V1= P2V2
B.V1 = V2 ÷ T1T2
C.P1T1 = P2T2
D.P1V1 ÷ T1 = P1V1 ÷ T2
E.

The direction of the path taken by light is called

A.Locus
B.Lines
C.Ray
D.Beam
E.

What is the inductance (L) of an inductor whose reactance is 1Ω at 50/ π hertz (H)?

A.100 H
B.0.01H
C.10H
D.1H
E.

A stroboscope can be used to make the ware appear …………..

A.Stationary
B.In motion
C.Dipper
D.Ripple
E.

In an elastic collision

I. Energy is conserved
II. Energy is decreased
III. Energy is increased
IV. Linear momentum conversed

A.I only
B.II and IV only
C.II only
D.III only
E.

Body floats in fluid when its …………………

A.Displaces its own volume of the liquid (fluid)
B.Displaces its own mass of the fluid
C.Displace its own density of the fluid
D.Is no longer subjected to gravity
E.

The general gas law can be written as

A.PV ÷ T = a constant
B.PV = a constant
C.v/t = a constant
D.p/T = a constant
E.

A motor boy of a driver saw what seem to appear to be a pool of water a head of him, while his driver’s drives a new truck on a funny day. Which of the following explains his observation?

A.He saw a flying objects
B.He must be thinking of water and food
C.He was seeing the shadow of the car
D.The sun ray from the sky were passing from a hot air (layer) to cold layer
E.

Which of the following is not luminous object?

A.The sun
B.The moon
C.light candle
D.Star
E.

The resultant force of a couple is ………?

A.Infinity
B.Zero
C.One
D.Half
E.

A vector quantity can only be completely described when ……… and …………are mentioned.

A.Magnitude and motion
B.Magnitude and direction
C.Distance and specified displacement
D.Moment and momentum
E.

In which of the following device in the expansion of solid is a disadvantages?

I. Simple pendulum
II. Fire alarms
III. Thermostat
IV. Bimetallic thermometer

A.III only
B.II & III only
C.I only
D.II, III & IV only
E.

If an object is placed at a height of tem above the ground at a stationary point. It posses what types of energy?

A.Mechanical energy
B.Stationary energy
C.Potential energy
D.Vibrational energy
E.

Calculate the gravitation force of attraction between two planets of 10²⁴kg and 10²⁷kg separated by a distance of 10²⁰meters.

A.6.67N
B.6.56N
C.7.5N
D.8.6N
E.

Mr. F. Abioye observed his image though a plane mirror, kept a distance way from him at 4.7m in his room at what distance is the image found from Abioye eye?

A.9.4m
B.7.5m
C.5.7m
D.6.9m
E.

Primary colours of light are

A.Red, blue and green
B.Cyan, magneta and yellow
C.Black, blue and green
D.None of these colours
E.

Electrons were discovered by

A.James Chadwick B.
B.J.J Thompson
C.Sir Isaac Newton
D.Charles Newton
E.

What is the relationship mechanical advantage (MA) velocity Ratio (V.R) and efficiency with percentage?

A.e = M.A/V.R × 100 %
B.M.A = E.V.R
C.V.R = 1 ÷ sin θ M.A
D.M.A = 1/E × 100%
E.

The external parts of an object can be measure accurately through the use of which scientific instrument?

A.Micrometer screw gauge
B.Vernier Caliper
C.Meter rule
D.None of the instrument
E.

Convert 45°C to kelvin

A.318K
B.250K
C.184K
D.120K
E.

A member of the crew of a SPACESHIP experiences weightlessness in a space when they

A.Fall freely from the earth’s gravitational field
B.Is walking on the planet
C.In between the sun and the earth
D.Holding anything in space is negative
E.

Radio waves belong to the class of wave whose velocity is about

A.34m/s
B.3 ×10⁶m/s
C.3 ×10⁸m/s
D.3 × 10^-8m/s
E.

At 35°C and 5 atmospheres pressure the density of a gas is 0. 600g per liter. What is the density at 7 atmospheric pressure and 350°C.

A.0.27g / liters
B.0.25g / liters
C.17g / liters
D.0.15g / liters
E.

The compressed regions and the space-out regions in longitude wave are refers to as

A.Compression and Rarefaction
B.Comparison and Explosion
C.Reflection only
D.Refraction only
E.

At what respective value of a, b, and c would the unit of work, the joule, be dimensionally similar to M^a L^b T^c?

A.1, – 2, 1
B.1, 2, – 2
C.1, 1, –2
D.2, 2, 1
E.

The device in which one circuit controls another, especially if the current in the second circuit is large or dangerous is known as

A.Electromagnetic devices
B.Magnetic relay device
C.None at all
D.Sextant
E.

Heat losses to the surrounding is possible through the following except

A.Conduction
B.Convection
C.Radiation
D.Expansion
E.

Quantities of heat Q can be measured using a container called

A.Thermometer
B.Measuring cylinder
C.Calorimeter
D.Meter rule
E.

Lodestone is a natural magnet, it points at

A.N – W when suspended freely
B.N–S when suspended freely
C.S – E when suspended freely
D.S–W when suspended freely
E.

What type of electromagnetic radiation can be used to take photographs in the haze?

A.Radio waves
B.infrared rays
C.Visible light
D.Gamma rays
E.

If a mango fruit dropped at a height of 50 meters. How long does it reach the ground? (take g = 10m/s²)

A.2 sec
B.3 sec
C.4sec
D.3.2sec
E.

A zinc has a heat capacity of 40 J/K, what is the mass of the zinc, given that the specific heat of zinc is 380 J/kg k

A.0.11kg
B.0.12kg
C.0.13kg
D.0.14kg
E.

If a ball released from a height of 20m, How long would it take the ball to reach the ground? (assures g = 10m/s)

A.2sec
B.3sec
C.35sec
D.2.4sec
E.

If the velocity ratio of a machine is 5. What is its ratio of x and y?

A.2 : 5
B.1 : 5
C.5 : 1
D.3 : 1
E.

If the mechanical advantage of a machine is 4. What is its ratio for LOAD to EFFORT?

A.4:01
B.1:04
C.5:01
D.2:01
E.

For a best result using temperature to achieve an accurate measurement, it is best to use

A.Mercury thermometer
B.gas thermometer
C.clinical thermometer
D.alcohol thermometer
E.

A structural engineer stood on a top of a building releasing a light and heavy object to the ground which of the following statement is true?(Neglect Air Resistance)

A.Bothe light and heavy subject reach the ground at the same time
B.he light object get to the ground first before the heavy object
C.he heavy object to the ground first before the light object
D.None get to the ground first
E.

If an object which mass is 3kg moves in a circular path of a radius 0.7m, record a speed at 2m/s what is the result of the angular velocity?

A.4 rads^–1
B.1rads–1^–1
C.3^–1rads–1
D.4rads–1^–1
E.

The optical instrument which is suitable for viewing a nearby objects is ………..?

A.Telescope
B.sextant
C.microscope
D.periscope
E.

The symbol ₋₁⁰X used to represent which of the particles?

A.Proton
B.Neutron
C.Electrons
D.Atoms
E.

A radioactive source emits X–rays of very short wavelength (10 ^-13m ) what is the frequently of these rays?

A.2 × 10¹⁸HZ
B.3 × 10 ¹⁹HZ
C.3 × 10²¹HZ
D.3 × 10^-19HZ
E.

The strength of an electromagnet increase with

A.Increase in the number of turn of the coil
B.Decrease in current with the coil
C.Increase in the distance between the pole
D.Increase in current without the coil
E.

A platinum resistance thermometer wire has a resistance of 70hms at 0°Cand 7.5 Ohms at 100°C. Calculate the temperature of the wire when the resistance is 7.2 Ohms

A.15°C
B.40°C
C.20°C
D.10°C
E.

Which of the following will increases the boiling point of water?

I. Taking it to a high altitude
II. Dissolving a salt into it
III. Heating it in a sealed flask
IV. Increasing the rate of heat supply

.

A.I only
B.III & IV only
C.II & III only
D.II only
E.

What is the magnitude of the couple which acts on a rotating circular disc of radius 2m, if a constant tangential force of 2N is responsible for the rotation.

A.15Nm
B.25Nm
C.3Nm
D.4Nm
E.

Transformers are designed so that energy losses are reduced to a minimum. This is achieved through those process.

I. Using a soft iron ore
II. Laminating the iron core to reduce energy loses due to eddy current
III. Designing an efficient iron core

A.I & II only
B.II only
C.I, II, & III only
D.III only
E.

The two liquids which are often used in thermometer on experiment basic is known as

A.Mercury only
B.Alcohol and Water
C.Mercury and Alcohol
D.Alcohol only
E.

Neutron were discovered by

A.J.J. Thompson
B.James Chadwick
C.Michael faraday
D.Dalton
E.

If a projectile has maximum range of 36m, find the speed of projection (Take g = 9.8m/s²)

A.27m/s²
B.2m/s²
C.4m/s²
D.7m/s²
E.