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2,483 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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2,483 questions

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Question 231

jamb 2019

If the attraction of the sun is suddenly ceased, the earth would continue to move in a straight line making a tangent with the original orbit. This statement is derived from Newton's

AFirst law of motion

BSecond law of motion

CThird law of motion

DLaw of universal gravitation

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Question 232

jamb 2019

Which of the following characteristics of a wave is used in the measurement of the depth of the Sea?

Adiffraction

Binterference

Crefraction

Dreflection

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Question 233

jamb 2019

Which of these is observed when air is pumped out of a discharge tube without lowering its pressure

Athe conductivity of the air increases

Bthe conductivity of the air decreases

Cconduction does not occur

Dspark are produced

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Question 234

jamb 2019

The volume of 0.354g of helium at 273°C and 114cmhg of mercury pressure is 2667cm\(^3\). Calculate the volume at STP.

A2000.25 cm\(^3\)

B200.025 cm\(^3\)

C4003.27 cm\(^3\)

D2010.25 cm\(^3\)

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Question 235

jamb 2019

When two objects A and B are supplied with the same quantity of heat, the temperature change in A is obtained to be twice that of B. The mass of A is half that of B. The ratio of the specific heat capacity of A to B is

A1 : 4

B4 : 1

C1 : 1

D2 : 1

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Question 236

jamb 2019

The following are some units
I. Ns
II. Non
III. Nm\(^{-2}\)
IV. J°K\(^{-1}\)
V. JKg\(^{-1}\)
What are the units of latent heat?

BII

CIII

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Question 237

jamb 2019

A boy pushes a 500kg box along a floor with a force of 2000N. If the velocity of the box is uniform, the co-efficient of friction between the box and the floor is

A0.8

C0.65

D0.4

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Question 238

jamb 2019

A coil X is moved quickly away from the end Y of a stationary metal bar and a current then flows in X as shown above.
Then

Athe bar is not a magnet

BY is a north pole

CY is a South pole

DY repels coil X

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Question 239

jamb 2019

The lower fixed part of a faulty thermometer reads 2°C while the upper fixed point is 100°C.
What is the true temperature when the thermometer reads 51°C?

A52°C

B50°C

C49°C

D46°C

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Question 240

jamb 2019

The resultant capacitance in the figure above is

A0.4μf

B0.8μf

C1.8μf

D4.5μf

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Question 241

jamb 2019

The point at which the molecules of a loaded wire begin to slide across each other resulting in a rapid increase in extension is

Ayield point

Bproportionality point

Cdeformation point

Delastic point

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Question 242

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 243

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 244

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 245

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 246

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 247

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 248

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 249

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 250

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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