JAMB UTME - Physics - 2016 | Green Bridge CBT

Question 1 Report

Which of the following statements is correct about a machine?

Efficiency of a machine is always greater than I

Efficiency decreases with an increase in friction

Velocity ratio depends on friction

Mechanical advantage increases with an increase in friction

Simple Machines

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Question 2 Report

Calculate the inductance of a coil of resistance \(30\Omega\) connected to a 100V a.c source if the coil draws an r.m.s current of 2A

0.60H

2.50H

1.25H

0.04H

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Question 3 Report

What is the angular magnification of a telescope having objective and eyepiece lenses of a focal lengths 30cm and 3cm respectively?

60

10

30

90

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Question 4 Report

A boy in a barber's shop sits between two parallel mirrors. The number of images observed by him will be

Infinite

Ten

Eight

Forty

Properties Of Waves: Reflection, Refraction, Diffraction

Electrostatics

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Question 5 Report

The impulse of a force is deduced from Newton's second law as

F = ma

F = m(

\frac{v - u}{t}

)

F = mg

F = mv - mu

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Question 6 Report

The relative density of a liquid is the ratio of the

Mass of water to the mass of an equal volume of liquid

Upthrust in the liquid to the upthrust in water

Density of water to the density of the liquid

Upthrust in water to the upthrust in the liquid

Measurements And Units

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Question 7 Report

The heat required to raise a mass of a substance through 1K is known as

Specific heat capacity

Specific latent heat of vaporization

Capacity latent heat of fusion

Heat capacity

Heat Energy

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Question 8 Report

Which of the following statements is NOT correct?

Brownian motion is an evidence of the particle nature of matter

Atoms combine to form molecules

The molecules of matter are in constant motion

matter is made up of molecules

Thermal Expansion

Structure Of Matter And Kinetic Theory

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Question 9 Report

A satellite moves in a circular orbit of radius 4R round the earth. The acceleration of the satellite in terms of g is

g/16

g/4

4/g

16/g

Answer Details

\frac{g}{R^{2}}

=

\frac{g}{4^{2}}

=

\frac{g}{16}

Read lesson note on Gravitational Field (WAEC)

Gravitational Field

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Question 10 Report

A manometer is an instrument used for measuring

Relative density of liquid

Pressure in liquids and gases

Humidity

Atmospheric pressure

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Question 11 Report

Calculate the temperature of 6 moles of an ideal gas at a pressure of 7.6 x 106Nm-2 with a volume of 10-3m3.

[R = 8.3jmol-1K-1]

201oC

126oC

153oC

185oC

Answer Details

T =

\frac{P V}{n R}

=

\frac{7.6 x 10^{6} x 10^{-} 3}{6 x 8.3}

= 153oC

Read lesson note on Temperature And Its Measurement (JAMB)

Temperature And Its Measurement

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Question 12 Report

An electron in a hydrogen atom makes a transition from the ground level to the third level. If the energy at the ground level.

calculate the energy at the third level.

[h = 6.6 x 10-34Js; f = 1015Hz]

1.41eV

1.71eV

1.61eV

1.51eV

Answer Details

E =

\frac{E_{o}}{n^{2}}

=

\frac{13.6}{3^{2}}

=

\frac{13.6 e V}{9}

= 1.51eV

Read lesson note on Structure Of The Atom (Nigeria Only) (WAEC)

Structure Of The Atom (Nigeria Only)

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Question 13 Report

A metre rule is pivoted at its mid-point with a vertical force of 10N hanging from the distance 30cm from the mid-point. At what distance must a 15N force hang to balance the ruler horizontally?

30cm

10cm

20cm

25m

Equilibrium Of Forces

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Question 14 Report

Vapour is said to be saturated on top of an enclosed liquid if _________

The rate of condensation is greater than that of vapourization

The rate of condensation is equal to that of vapourization

There is neither condensation nor vaporization of the liquid

The rate of condensation is less that that of vaporization

Vapours

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Question 15 Report

An object is placed 15cm in front of a plane mirror. If the mirror is moved further 5cm away from the object and the image is

80cm

40cm

50cm

70cm

Reflection Of Light At Plane And Curved Surfaces

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Question 16 Report

A charged particle is moving in a uniform magnetic field. if the direction of motion of the charged particle is parallel to the magnetic field, the path of the charge will

Be a straight line

Curve inwards

Be a parabola

Curve outwards

Electric Field

Magnetic Field (Part 1)

Electromagnetic Field (Part 2)

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Question 17 Report

What will happen to the pressure of a gas if its temperature is reduced to -273oC?

It will decrease

it will drop to zero

It will increase

It will remain constant

Pressure

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Question 18 Report

Shadows and eclipse result from the

Reflection of light

Rectilinear propagation of light

Diffraction of light

Refraction of light

Description Property Of Fields

Reflection Of Light At Plane And Curved Surfaces

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Question 19 Report

What happens to a water pool on a day when the humidity of the air is very low?

Temperature decreases

Slow evaporation

Temperature increases

Rapid evaporation

Change Of State

Temperature And Its Measurement

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Question 20 Report

The frequency of beats produced when two tunning forks of frequencies 258Hz and 270Hz are sounded close to each other

6Hz

264Hz

528Hz

12Hz

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Question 21 Report

A radioactive isotope has a decay constant of 10-6s-1.

Calculate its half - life?

5.93 x 106s

6.93 x 107s

6.93 x 109s

5.93 x 107s

Answer Details

t1/2 =

\frac{0.693}{γ}

=

\frac{0.693}{10^{-} 6}

= 6.93 x 107

Read lesson note on Wave-particle Paradox (WAEC)

Wave-particle Paradox

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Question 22 Report

The rate of cooling of a heated quantity of liquid in an enclosure depends on the

Pressure of the liquid

Temperature in the enclosure

Pressure of the enclosure

Volume of the liquid

Temperature And Its Measurement

Pressure

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Question 23 Report

A wire of length 10m is cooled from 50oC to 10oC. Calculate the decrease in the length of the wire. [c = 3 x 10-5K-1]

1.8 x 10-4m

1.5 x 10-4m

1.5 x 10-3m

1.8 x 10-3m

Temperature And Its Measurement

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Question 24 Report

The instrument used to view stars is the

Prism binoculars

Telescope

Film projector

Microscope

Optical Instruments

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Question 25 Report

Semiconductor is a class of solid whose conductivity increases with an increase in

Pressure

Temperature

Current

Voltage

Electrostatics

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Question 26 Report

Which of the following does Not use magnetic effect of current to function?

Lead acid accumulator

An electric bell

A moving coil galvanometer

A telephone receiver

Magnets And Magnetic Fields

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Question 27 Report

A body which weighs 50N in air displaces 3.7kg of water when partially immersed in water. Calculate the upthrust on the body?

8.7N

37.0N

87.0N

13.0N

Gravitational Field

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Question 28 Report

Myopic defects in the human eye can be corrected through the use of a

Concave Mirror

Concave lens

Prism

Convex lens

Properties Of Waves: Reflection, Refraction, Diffraction

Electrostatics

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Question 29 Report

Which of the following waves is both transverse and mechanical?

Water waves

Radio waves

Sound waves

X-rays

Sound Waves

Refraction Of Light Through Plane And Curved Surfaces

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Question 30 Report

A dynamo primarily converts

Mechanical energy into electrical energy

Electrical energy into kinetic energy

Potential energy into kinetic energy

Kinetic energy into potential energy

Current Electricity

Electric Cells

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Question 31 Report

A satellite revolving around the earth is kept on its orbit by

Centripetal forces only

Centripetal and frictional forces

Centrifugal forces only

Centripetal and centrifugal forces

Equilibrium Of Forces

Gravitational Field

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Question 32 Report

If the magnification of a virtual image formed by an object 10cm from a convex less is 3, then the focal length of the lens is

10cm

20cm

25cm

15cm

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Question 33 Report

Which of the following instruments can be used to measure current in an a.c circuit?

Hot wire ammeter

Moving coil ammeter

Tangent galvanometer

Moving coil galvanometer

Capacitors

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Question 34 Report

A saturated vapour pressure of a liquid increases when the

Temperature of a liquid increases

Volume of the liquid increases

Volume of the liquid decreases

Temperature of the liquid decreases

Vapours

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Question 35 Report

Which of the following is obtained when a magenta is mixed with green colour?

Yellow

Blue

White

Red

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Question 36 Report

When an athlete perspires after running, he loses heat through

Evaporation

Conduction

Radiation

Convection

Heat Transfer

Temperature And Its Measurement

Simple A.C Circuits

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Question 37 Report

If the distance between the object and the pinhole of a pinhole camera is reduced by half the size of the image of the object

Is quadrupled

Is halved

Remains the same

Is double

Reflection Of Light At Plane And Curved Surfaces

Position, Distance And Displacement

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Question 38 Report

Which of the following electromagnetic waves has the shortest wavelength?

Visible Light

Ultraviolet rays

Infrared rays

Gamma rays

Electromagnetic Waves: Types Of Radiation In Electromagnetic Spectrum

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Question 39 Report

Which of the following statements is Not true about atoms?

Atom of different elements have different atomic weights

The mass of an atom is concentrated in the nucleus

An atom is made up of a nucleus and number of electrons

Atoms of all elements are identical

Structure Of The Atom (Nigeria Only)

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Question 40 Report

What force has to be exerted on a mass 60kg to give it an acceleration of 10ms-2 vertically upwards?

[g = 10ms-2

300N

600N

1200N

400N

Equilibrium Of Forces

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Question 41 Report

A pool of water appears to be 1.00m deep when viewed vertically from above. What is the actual depth of the pool?

[Refractive index of water = 1.33]

13.300m

0.750m

1.013m

1.330m

Answer Details

n =

\frac{Read depth}{Apparent depth}

= 1.33 =

\frac{R d}{1}

Rd = 1.33 x 1 = 1.330m

Read lesson note on Refraction Of Light Through Plane And Curved Surfaces (JAMB)

Refraction Of Light Through Plane And Curved Surfaces

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Question 42 Report

I.Chemical
II.Sound
III.Electricity

Which of the above forms of energy can directly be converted to light energy?

I and II only

II and III only

I, II and III

I and III only

Sound Waves

Structure Of The Nucleus

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Question 43 Report

In the diagram above, the direction of the force between N and S in the magnetic field is

MP

SN

NS

PM

Magnets And Magnetic Fields

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Question 44 Report

From the diagram above, the measuring accuracy of the micrometer screw gauge is

4.78mm

4.16mm

4.66mm

4.70mm

Measurements And Units

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Question 45 Report

In the diagram above, which of the following velocity-time graphs shows uniform acceleration of a body from rest?

C

D

B

A

Rectilinear Acceleration

Speed And Velocity

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Question 46 Report

A projectile is fired from the ground level with a velocity of 300ms-1 at an angle of a 30o to the horizontal.

Calculate the time taken to reach the maximum height?

[g = 10ms-2]

30s

20s

25s

15s

Answer Details

t =

\frac{u s i n θ}{g}

=

\frac{300 sin 30}{10}

Read lesson note on Motion (JAMB)

Motion

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Question 47 Report

In the diagram above, the neutral point is at

R

X

S

P

Electromagnetic Field (Part 2)

Gravitational Field

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Question 48 Report

Boiling occurs when the vapour pressure of a liquid is

At the evaporation point

Less than the atmospheric pressure

Greater than the atmospheric pressure

Equal to the atmospheric pressure

Vapours

Measurements And Units

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Question 49 Report

Which of the following statements about wave motion is correct?

Electromagnetic waves are transverse

Transverse waves do not require a medium for propagation

Longitudinal waves vibrate perpendicular to the direction of travel

All mechanical waves are longitudinal

Electromagnetic Waves: Types Of Radiation In Electromagnetic Spectrum

Types Of Waves

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Question 50 Report

A train with an initial velocity of 20ms-1 is subjected to a uniform deceleration of 2ms-2. The time required to bring the train to a complete halt is

40s

10s

20s

5s

Motion

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