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89 questions

Question 1 of 20 89 total questions

Question 31

jamb 2013

Calculate the force acting on an electron of charge 1.5 x 10^-19C placed in an electric field of intensity 10⁵Vm^-1

A1.5x10^-11N

B1.5x10^-12N

C1.5x10^-13N

D1.5x10^-14N

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Question 32

jamb 2013

The angle of deviation of light of various colours passing through a triangular prism increases in the order

Ared → green → blue

Bgreen → violet → blue

Cblue → red → green

Dblue → green → red

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Question 33

jamb 2013

If the linear magnification of the objective and eyepiece convex lenses of a compound microscope are 4 and 7 respectively. Calculate the angular magnification of the microscope

C11

D28

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Question 34

jamb 2013

Total internal reflection will not occur when light travels from

Awater to air

Bwater into glass

Cglass to air

Dglass into water

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Question 35

jamb 2013

A ray of light passing through the centre of curvature of a concave mirror is reflected by the mirror at?

A0^o

B45^o

C90^o

D180^o

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Question 36

jamb 2013

A man 1.5m tall is standing 3m in front of a pinhole camera whose distance between the hole and the screen is 0.1m. What is the height of the image of the man on the screen?

A0.05m

B0.15m

C0.30m

D1.00m

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Question 37

jamb 2013

If a sonometer has a fundamental frequency of 450HZ, what is the frequency of the fifth overtone?

A2700Hz

B456Hz

C444Hz

D75Hz

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Question 38

jamb 2013

What is the velocity of sound at 100 oC if the velocity of sound at 0 oC is 340ms -1?

A497m^-1

B440m^-1

C397m^-1

D240m^-1

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Question 39

jamb 2013

A transverse wave and a longitudinal wave travelling in the same direction in a medium differ essentially in their

Afrequency

Bamplitude

Cdirection of vibration of the particles of the medium

Dperiod of vibration of the particles of the medium

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Question 40

jamb 2013

A wave that travels through stretched strings is known as

Aelectromagnetic wave

Bmicro wave

Cmechanical wave

Dseismic wave

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Question 41

jamb 2013

The mechanism of heat transfer from one point to another through the vibration of the molecules of the medium is

Acovection

Bconduction

Cradiation

Ddiffusion

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Question 42

jamb 2013

The rise or fall of a liquid in a narrow tube is because of the

Aviscosity of the liquid

Bsurface tension of the liquid

Cfriction between the walls of the tube and the liquid

Dosmotic pressure of the liquid

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Question 43

jamb 2013

What will happen to the boiling point of pure water when it is heated in a place 30m below sea level?

AIt will be more than 100 ^oC

BIt will be last than 100 ^oC

CIt will still be at 100 ^oC

DIt will be fluctuating

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Question 44

jamb 2013

Steam from boiling water causes more damage on the skin than does boiling water because

Awater has a high specific heat

Bsteam has latent heat of fusion

Cthe steam is at a highter temperature than the water

Dsteam brings heat more easily by convection

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Question 45

jamb 2013

Two liquids X and Y having the same mass are supplied with the same quantity of heat. If the temperature rise in X is twice that of Y, the ratio of specific heat capacity of X to that of Y is

A2:1

B1:2

C4:1

D1:4

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Question 46

jamb 2013

A gas at a pressure of 10⁵Nm^-2expands from 0.6m^-3 to 1.2m³ at constant temperature, the work done is

A7.0 x 10⁶J

B6.0 x 10 ⁶J

C6.0 x 10 ⁵J

D6.0 x 10 ⁴J

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Question 47

jamb 2013

A wire of length 100.0m at 30^o has linear expansive of 2x10^-5K^-1 Calculate the length of the wire at a temperature of - 10^oC

A100.08m

B100.04m

C99.96m

D99.92m

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Question 48

jamb 2013

Calculate the length which corresponds to a temperature of 20^oC if the ice and steam points of an unguarded thermometer are 400 mm apart

A20mm

B30mm

C60mm

D80mm

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Question 49

jamb 2013

What volume of alcohol will have same mass as 4.2m-3 of petrol?
Density of alcohol = 8.4 x 10^2 kgm-3, density of petrol =7.2x10^2 kgm-3

A0.8m³

B1.4m³

C3.6m³

D49.m³

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Question 50

jamb 2013

Calculate the work done when a force of 20N stretches a spring by 50mm.

A0.5J

B1.5J

C2.0J

D2.5J

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