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101 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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101 questions

Question 1 of 20 101 total questions

Question 21

jamb 2019

In which of the points labelled A, B, C, D and E on the conductor shown would electric charge tend to concentrate most

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Question 22

jamb 2019

Any line or section taken through an advancing wave in which all the particles are in the same phase is called the

Awavelength

Bwave coast

Cwave trough

Dwave front

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Question 23

jamb 2019

A car moving at 20m/s with its horn blowing (f = 1200Hz) is chasing another car going at 15m/s. What is the apparent frequency of the horn as heard by the driver being chased?

A1.22KHz

B2.40KHz

C8.12KHz

D1.22Hz

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Question 24

jamb 2019

The Earth's magnetic equator passes through Jos in Nigeria. At Jos, the

Aangle of variation is zero

Bmagnetic declination is 90

Cangle of dip is zero

Dhorizontal component at the Earth's field is zero

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Question 25

jamb 2019

Calculate the velocity ratio of a screw jack of pitch 0.2cm if the length of the tommy bar is 23cm

A230\(\pi\)

B23\(\pi\)

C70\(\pi\)

D140\(\pi\)

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Question 26

jamb 2019

Which of the following statement about the electromagnet shown above is correct?

Awhen the current flows from A to B, the end A will be in north pole

Bwhen the current flows from A to B, the end A will be south pole

Cwhen the current flows from A to B, the end B will be south pole

Dnone of the above

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Question 27

jamb 2019

A single force which produces the same effect as a set of forces acting together at a point is known as the

Acomponent

Bequilibrant

Cresultant

Dresistant

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Question 28

jamb 2019

Radio waves belongs to the class of waves whose velocity is about

A340m/s

B3 × 10\(^{6}\) m/s

C3 × 10\(^{8}\) m/s

D3 × 10\(^{-8}\) m/s

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Question 29

jamb 2019

A microscope is focused on a mark on a table, when the mark is covered by a plate of glass 2m thick, the microscope has to be raised 0.67cm for the mark to be once more in focus. Calculate the refractive index.

A1.50

B1.68

C2.58

D1.82

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Question 30

jamb 2019

One newton × One meter equals?

AOne water

BOne Joule

COne ampere

DOne kilogram

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Question 31

jamb 2019

When a girl moves towards a plane mirror at a speed of 4.0m/s, the distance between the girl & her image reduces at a speed of

A2 m/s

B4 m/s

C8 m/s

D12 m/s

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Question 32

jamb 2019

Water and Kerosine are drawn respectively into the two limbs of a Hare's apparatus. The destiny of water is 1.0gcm\(^{-3}\) and the density of kerosine is 0.80gcm\(^{-3}\). If the height of the water column is 20.0cm, calculate the height of the kerosine column.

A1.6cm

B16.0cm

C20.0cm

D25.0cm

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Question 33

jamb 2019

In semi-conductor, the carriers of current at room temperature are

Aelectrons only

Belectrons and holes

Choles only

Delectron and ions

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Question 34

jamb 2019

An a.c of 1A at a frequency of 800 cycles per second flows through a coil, the inductance of which is 2.5mH and the resistance of which is 5Ω. What is the power absorbed in the Coil?

A5W

B6W

C7W

D8W

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Question 35

jamb 2019

Three resistors with resistance 200Ω, 500Ω and 1kΩ are connected in series. A 6v battery is connected to either end of the combination. Calculate the potential difference between the ends of 200Ω resistance.

A0.71V

B0.7V

C0.82V

D0.8V

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Question 36

jamb 2019

The mass of a nucleus is the

Atotal number of its proton & neutrons

Bnumber of its protons

Cmass of its electrons

Dtotal number of its protons & electrons

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Question 37

jamb 2019

Neutrons were discovered by

AFaraday

BDalton

CJames Chadwick

DRutherford

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Question 38

jamb 2019

Gases conduct electricity under

Ahigh pressure & high voltage

Blow pressure & low voltage

Cnormal pressure & low voltage

Dlow pressure & high voltage

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Question 39

jamb 2019

A man on a bench will exert the greatest pressure on the bench when he

Alies flat on his back

Blies flat on his belly

Cstands on both feet

Dstands on the toes of one foot

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Question 40

jamb 2019

A siren having a ring of 200 hole makes 132 rev/min. A jet of air is directed on the set of holes. Calculate the frequency and wavelength in air of the note produced (take v = 350m/s)

A0.795m

B0.625m

C0.335m

D0.125m

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