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

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2,483 questions

Question 1 of 20 2,483 total questions

Question 681

jamb 2002

The particle that is responsible for the nuclear fission in a nuclear reactor is

Aneutron

Bprton

Celectron

Dphoton

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Question 682

jamb 2002

From the generating station to each substation power is transmitted at a very high voltage so as to reduce

Ahysteresis loss

Beddy current loss

Cmagnetic flux leakage

Dheating in the coils

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Question 683

jamb 2002

The percentage of the original nuclei of the sample of a radioactive substance left after 5 half - lives is

A8%

B5%

C3%

D1%

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Question 684

jamb 2002

The energy associated with the photon of a radio transmission at 3 x 10⁵ Hz is
[h = 6.63 x 10^-34Js]

A2.00 x 10^-28J

B1.30 x 10^-28J

C2.00 x 10^{- 29}J

D1.30 x 10^-29J

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Question 685

jamb 2002

Pure silicon can be converted to a p-type by adding a controlled amount of

Atrivalent atoms

Btetravalent atoms

Cpentavalent atoms

Dhexavalent atoms

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Question 686

jamb 2002

\(^{23}_{11}\)Na + X → \(^{20}_9\)F + \(^4_2\)He

What particle is X in the reaction above?

AAlpha

BBeta

CNeurons

DGamma

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Question 687

jamb 2002

an electric cell with nominal voltage E has a resistance of 3Ω connected across it. If the voltage falls to 0.6E, the internal resistance of the cell is

A1Ω

B2Ω

C3Ω

D4Ω

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Question 688

jamb 2002

The electromagnetic wave that can produce a heating effect on the environment is

Ax -rays

Bultraviolet rays

Cinfrared rays

Dgamma rays

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Question 689

jamb 2002

The electric field between two - point charges is shown in the diagram above. What types of charges are at X and Y?

ABoth X and Y are negative

BBoth X and Y are positive

CX is positive and Y is negative

DX is negative and Y is positive

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Question 690

jamb 2002

An electric iron is rated 1000W, 230V. What is the resistance of its elements?

A51.9Ω

B52.9Ω

C55.9Ω

D57.6Ω

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Question 691

jamb 2002

The eye controls the amount of light reaching the retina by adjusting the

Acornea

Biris

Cretina

Doptic nerve

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Question 692

jamb 2002

When connected to a mains of 250V, the fuse rating in the plug of an electric device of 1 KW is

A2 A

B3 A

C4 A

D5 A

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Question 693

jamb 2002

The energy stored in a capacitor of capacitance 10μF carrying a charge of 100μC

A5 x 10⁴ J

B4 x 10² J

C4 x 10^-3 J

D5 x 10^-4 J

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Question 694

jamb 2002

From the diagram above, determine the value of the resistance X

A6Ω

B9Ω

C12Ω

D15Ω

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Question 695

jamb 2002

Calculate the refractive index of the material for the glass prism in the diagram above

A^√2/₂

B⁴/₃

C√2

D³/₂

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Question 696

jamb 2002

The diagram above shows the force (F) acting on an object through a distance (x). The work done on this object is expressed as

AFx J

B^Fx/₂ J

CFx² J

D^F/_x J

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Question 697

jamb 2002

The diagram above show s the force-extension curve of a piece of wire. The energy stored when the wire is stretched from E to F is?

A7.5 x 10^-3J

B2.5 x 10^-3J

C1.5 x 10^-2J

D7.5 x 10^-1J

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Question 698

jamb 2002

Vibration in a stretched spring cannot be polarized because they are

Astationary waves

Btransverse waves

Clongitudinal waves

Dmechanical waves

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Question 699

jamb 2002

the pressure of 3 moles of an ideal gas at a temperature of 27°C having a volume of 10^-3m³ is

A2.49 x 10⁵

B7.47 x 10⁵

C2.49 x 10⁶

D7.47 x 10⁶

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Question 700

jamb 2002

The phenomenon that makes sound persist when its source has been removed is known as

Aacoustic vibration

Brarefaction

Cecho

Dreverberation

View Explanation & Discuss

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