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99 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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99 questions

Question 1 of 20 99 total questions

Question 31

jamb 2017

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

AZener material

BP-n junction

Cn-type

Dp-type

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Question 32

jamb 2017

When two mirrors are placed at an angle of 90º to each other, how many images will be formed when an object is placed in front of the mirrors

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Question 33

jamb 2017

The action of blotting paper on ink is due to

Adiffusion

Bosmosis

Ccapillarity

Dsurface tension

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Question 34

jamb 2017

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

A100 πrads\(_{−1}\)

B200 πrads\(_{−1}\)

C50 πrads\(_{−1}\)

D400 πrads\(_{−1}\)

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Question 35

jamb 2017

The instrument to measure the relative density of liquid is

Athermometer

Bhydrometer

Cspring balance

Dbeaker

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Question 36

jamb 2017

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

AAn electron

BA β - particle

Cβ - particle

Dproton

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Question 37

jamb 2017

Which of the following surfaces will absorb radiant heat energy?

Awhite

Bred

Cblack

Dblue

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Question 38

jamb 2017

Which of the following is a semiconductor

Acopper

Bsilicon

Cplastic

DIron

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Question 39

jamb 2017

Which of the following is correct about an electric cell?

APrimary cell produces a large current for a long time

BSecondary cell has a very high internal resistance

CPrimary cell has a very low internal resistance

DSecondary cell has a very low internal resistance

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Question 40

jamb 2017

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

AII and III only

BI, II and III

CI and II only

DI and III only

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Question 41

jamb 2017

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

A125kgms−1

B25kgms−1

C15kgms−1

D0kgms−1

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Question 42

jamb 2017

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

A4.0 x 10\(^{-2}\)J

B4.0 x 10\(^{-4}\)J

C8.0 x 10\(^{-4}\)J

D8.0 x 10\(^{-2}\)J

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Question 43

jamb 2017

How can energy loss be minimized through Eddy-current?

ABy using high resistance wire

BBy using insulated soft iron wires

CBy using low resistance wires

DBu using turns of wires

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Question 44

jamb 2017

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\(^{-2}\)]

A0.04m

B0.12m

C0.01m

D0.08m

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Question 45

jamb 2017

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

A0.1 m

B0.2 m

C2.0 m

D2.5 m

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Question 46

jamb 2017

Which of the following is a scalar quantity?

ATension

BWeight

CImpulse

DMass

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Question 47

jamb 2017

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

A2.20 × 10\(^3\)m

B5.0 × 10\(^2\)m

C5.0 × 10\(^5\)m

D11.8 × 10\(^{11}\)m

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Question 48

jamb 2017

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

A100w

B200w

C400w

D500w

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Question 49

jamb 2017

The instrument used to measure the pressure of a gas is

Abarometer

Bthermometer

Chydrometer

Dmanometer

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Question 50

jamb 2017

The net capacitance in the circuit above is

A80µF

B6.0µF

C4.0µF

D2.0µF

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