JAMB Physics 2017 Past Questions

Question 0

Which is the incorrect formula for a body accelerating uniformly?

A.a = v² − u\(\frac{2}{2}\)
B.v² = u² + 2as
C.s = ut + \(\frac{1}{2}\) at²
D.v² − u²= 2as
E.

Objective

Question 0

Which of the following is not an electromagnetic radiation?

A.x - ray
B.Radio waves
C.sunlight
D.sound waves
E.

Objective

Question 0

Calculate the electric field intensity between two plates of potential difference 6.5V when separated by a distance of 35cm.

A.18.57NC\(^{-1}\)
B.53.06N C\(^{-1}\)
C.2.28NC\(^{-1}\)
D.0.80NC\(^{-1}\)
E.

Objective

Question 0

Why do soldiers march disorderly while crossing a bridge?

A.To prevent resonance on the bridge
B.To set the bridge into resonance
C.To make the b ridge collapse
D.To spread their weight evenly on the bridge
E.

Objective

Question 0

Calculate the upthrust on an object of volume 50cm³ which is immersed in liquid of density 103kgm^-3 [g = 10ms^-2]

A.0.8N
B.2.5N
C.0.5N
D.1.0N
E.

Objective

Question 0

Under what conditions are cathode rays produced in a discharge tube?

A.High pressure and low voltage
B.High pressure and high voltage
C.Low pressure and low voltage
D.Low pressure and high volatge
E.

Objective

Question 0

Under which of the following conditions is workdone

A.A man supports a heavy food above his head with his hands
B.A boy climbs onto a table
C.A man pushes unto a table
D.A woman holds a pot of water
E.

Objective

Question 0

Calculate the specific latent heat of vaporization of steam of 1.13 x 106J pf heat energy is required to convert 15kg of it to water.

A.7.53 x 105 Jkg\(^{-1}\)
B.7.53 x 10-2Jkg\(^{-1}\)
C.7.53 x 104Jkg\(^{-1}\)
D.7.53 x 10-3Jkg\(^{-1}\)
E.

Objective

Question 0

A cell of internal resistance 2 π supplies current to a 6 π resistor. The efficiency of the cell is

A.12.0%
B.25.0%
C.33.3%
D.75.0%
E.

Objective

Question 0

Which of the following statements is NOT correct?

A.Molecules of a liquid are stationary
B.Brownian motion is an evidence of particle nature of matter
C.Matter is made up of molecules
D.The molecules of matter are in constant motion
E.

Objective

Question 0

A block and tackle pulley arrangement has 6 pulleys in which an effort of 50N supports a load of 200N, calculate the efficiency of the machine

A.80.0%
B.76.6%
C.66.7%
D.60.7%
E.

Objective

Question 0

Three 3ω resistance are connected in parallel what is the equivalent resistance?

A.1ω
B.9ω
C.3ω
D.0.33ω
E.

Objective

Question 0

Which of the following instruments helps to maintain the correct humidity and temperature of a building?

A.A compressor
B.A refrigerator
C.Air blower
D.Air conditioner
E.

Objective

Question 0

An element and its isotope only differ in the number of

A.protons
B.electrons
C.ions
D.neutrons
E.

Objective

Question 0

The thermal expansion of a solid is an advantage in

A.Balance wheel of a watch
B.Construction of steel rail lines
C.Construction of large steel bridges
D.Fitting of tyres on wheels
E.

Objective

Question 0

The S.I unit of moment of a force is

A.kgm
B.µm
C.Jm
D.µm\(^{-1}\)
E.

Objective

Question 0

A block and tackle pulley arrangement has 6 pulleys in which an effort of 50N supports a load of 200N, calculate the efficiency of the machine

A.80.0%
B.76.6%
C.66.7%
D.60.7%
E.

Objective

Question 0

Calculate the light of the image formed by a pinhole camera of length 12cm used to photograph an object 60cm away from the hole and 70cm high

A.10 cm
B.16 cm
C.5 cm
D.14 cm
E.

Objective

Question 0

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 pf P to Q is

A.1:4
B.4:1
C.1:1
D.2:1
E.

Objective

Question 0

When the r.m.s value of a source of electricity supply is given as 240v, it means that the peak value of the supply is

A.240v
B.340v
C.480v
D.57600v
E.

Objective

Question 0

Which of the following operations can be used to convert an alternative current dynamo into a direct current dynamo

A.number of turns in the coil is increased
B.strength of the field magnet is increased
C.slip rings are replaced with split ring cummutator
D.coil is wound on a soft iron armature
E.

Objective

Question 0

The net capacitance in the circuit above is

A.80µF
B.6.0µF
C.4.0µF
D.2.0µF
E.

Objective

Question 0

The instrument used to measure the pressure of a gas is

A.barometer
B.thermometer
C.hygrometer
D.manometer
E.

Objective

Question 0

A man of mass 50kg ascends a flight of stains 5m high in 5 seconds. If acceleration due to gravity is 10ms\(^{-2}\) the power expended is

A.100w
B.200w
C.400w
D.500w
E.

Objective

Question 0

A radio station broadcast at a frequency of 600KHZ. If the speed of light in air is 3 × 108ms\(^{−1}\). Calculate the wavelength of the radio wave

A.2.20 × 10\(^3\)m
B.5.0 × 10\(^2\)m
C.5.0 × 10\(^5\)m
D.11.8 × 10\(^{11}\)m
E.

Objective

Question 0

Which of the following is a scalar quantity?

A.Tension
B.Weight
C.Impulse
D.Mass
E.

Objective

Question 0

Determine the focal length of a thin converging lens if the power is 5.0 dioptres

A.0.1 m
B.0.2 m
C.2.0 m
D.2.5 m
E.

Objective

Question 0

A string of length 5cm is extended by 0.04m when a load of 0.8kg is suspended at the end. How far will it extend if a force of 16N is applied? [g = 10ms\(^{-2}\)]

A.0.04m
B.0.12m
C.0.01m
D.0.08m
E.

Objective

Question 0

How can energy loss be minimized through Eddy-current?

A.By using high resistance wire
B.By using insulated soft iron wires
C.By using low resistance wires
D.Bu using turns of wires
E.

Objective

Question 0

From the diagram above, calculate the energy stored in the capacitor

A.4.0 x 10\(^{-2}\)J
B.4.0 x 10\(^{-4}\)J
C.8.0 x 10\(^{-4}\)J
D.8.0 x 10\(^{-2}\)J
E.

Objective

Question 0

A constant force of %n acts for a % seconds on a mass of 5kg initially at rest. Calculate the final momentum

A.125kgms−1
B.25kgms−1
C.15kgms−1
D.0kgms−1
E.

Objective

Question 0

I. Refraction II. Interference III. Diffraction Which of the above properties are common to all waves?

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

Objective

Question 0

I. Refraction II. Interference III. Diffraction Which of the above properties are common to all waves?

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

Objective

Question 0

Which of the following is correct about an electric cell?

A.Primary cell produces a large current for a long time
B.Secondary cell has a very high internal resistance
C.Primary cell has a very low internal resistance
D.Secondary cell has a very low internal resistance
E.

Objective

Question 0

Which of the following is a semiconductor

A.copper
B.silicon
C.plastic
D.Iron
E.

Objective

Question 0

Which of the following surfaces will absorbs radiant heat energy heat?

A.white
B.red
C.black
D.blue
E.

Objective

Question 0

It is known that a neutron exists in a light atomic nucleus
Which of the following also exists in the nucleus?

A.An electron
B.A β - particle
C.β - particle
D.proton
E.

Objective

Question 0

The instrument to measure the relative density of light is

A.thermometer
B.hydrometer
C.spring balance
D.beaker
E.

Objective

Question 0

What is the speed of a body vibrating at 50 cyclic per second

A.100 πrads\(_{−1}\)
B.200 πrads\(_{−1}\)
C.50 πrads\(_{−1}\)
D.400 πrads\(_{−1}\)
E.

Objective

Question 0

The action of blotting paper on ink is due to

A.diffusion
B.osmosis
C.capillarity
D.surface tension
E.

Objective

Question 0

When two mirrors are placed at an angle of 900 to each other, how many images will be formed when an object is placed in front of the mirrors

A.5
B.4
C.3
D.2
E.

Objective

Question 0

If silicon is doped with phosphorus, what type of semiconductor material will be formed?

A.Zener material
B.P-n junction
C.n-type
D.p-type
E.

Objective

Question 0

Calculate the angle of minimum deviation of a 60^o prism of a refractive index [sin^-10.75 = 49^o]

A.38.00^o
B.19.47^o
C.16.25^o
D.49^o
E.

Objective

Question 0

What is the cost of running seven 40 W lamps and five 80 W la mps for 12 hours of the electrical energy cost N7.00kWk?

A.N80.00
B.N45.36
C.N65.00
D.N57.12
E.

Objective

Question 0

From the diagram above, calculate the total current in the circuit

A.5.0A
B.3.7A
C.4.5A
D.4.0A
E.

Objective

Question 0

Calculate the time taken for a mango fruit that fall from the tree 20 m to the ground [g = 10 ms^-2]

A.10s
B.5s
C.4s
D.2s
E.

Objective

Question 0

Which of the following is not a mechanical wave?

A.wave in closed pipe
B.radio waves
C.water waves
D.sound waves
E.

Objective

Question 0

The velocity ratio of an inclined plane where angle of inclination in θ is

A.Sinθ
B.Cosθ
C.Tanθ
D.\(\frac{1}{\sin \theta}\)
E.

Objective

Question 0

The volume of a fixed mass of gas is 10cm³ when its pressure is 400cmHg. Determine the volume of the gas when its pressure is 200cmHg.

A.30cm³
B.40cm³
C.50cm³
D.20cm³
E.

Objective

Question 0

Which of the following representations is correct for an atom X with 28 electrons and 30 neutrons?

A.\(^{58}_{28}X\)
B.\(^{30}_{28}X\)
C.\(^{28}_{30}X\)
D.\(^{58}_{30}X\)
E.

Objective