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50 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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50 questions

Question 1 of 20 50 total questions

Question 11

jamb 2005

The electric field intensity in a place where a charge of 10^-10c experiences a force of 0.4N is?

A4.0 x 10⁷ NC^-1

B8.0 x 10⁹ NC^-1

C8.O x 10^-12 NC^-1

D4.0 x 10⁹ NC^-1

View Explanation & Discuss

Question 12

jamb 2005

A car battery rated 45 A H is charged with a charger whose rating is 2.5A.How long will it take to charge the battery full?

A10 hrs

B18 hrs

C20 hrs

D25 hrs

View Explanation & Discuss

Question 13

jamb 2005

The north pole of a magnet can never be separated from the south pole because of the property knowledge as?

Amagnetic octopole

Bmagnetic monopole

Cmagnetic dipole

Dmagnetic quadrupole

View Explanation & Discuss

Question 14

jamb 2005

An electric device is rated 2000 W, 250 v. The correct fuse rating of the device is?

A9 A

B8 A

C6 A

D7 A

View Explanation & Discuss

Question 15

jamb 2005

Satellite communication network makes use of?

Avisible light

Bsound wave

Cradio wave

Dinfra-red wave

View Explanation & Discuss

Question 16

jamb 2005

When very hot water is poured into two identical thin and thick glass tumblers in equal volumes, the thick one cracks because?

Aof the even expansion of glass

Bglass is a crystal

Cglass is a good conductor of heat

Dof the uneven expansion of glass

View Explanation & Discuss

Question 17

jamb 2005

I. Melting

II. Boiling

III. Refraction

IV. Conduction

Which combination of the above is evident of the molecular nature of matter?

AII , III and IV only

BI ,II and IV only

CI , III and IV only

DI , II and III only

View Explanation & Discuss

Question 18

jamb 2005

The process whereby a liquid turns spontaneously into vapour is called?

Aregelation

Bsublimation

Cboiling

Devaporation

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Question 19

jamb 2005

I. reproducibility

II. Sensibility

III. High thermal capacity

iv. High accuracy

The quantities of a good thermometer include?

AI, II and IV only

BI, III and IV only

CI, II and III only

DII, III and IV only

View Explanation & Discuss

Question 20

jamb 2005

The process whereby the molecules of different substances move randomly is called?

Acapillarity

Bsurface tension

Cosmosis

Ddiffusion

View Explanation & Discuss

Question 21

jamb 2005

A body of mass 36kg falls through a viscous liquid which offers a drag force of 260N on the body. The upthrust on the body at terminal velocity is?
[g = 10ms\(^2\)]

A100N

B620N

C50N

D310N

View Explanation & Discuss

Question 22

jamb 2005

A 3m³ volume of liquid W of density 200kgm³ is mixed with another liquid L of volume 7m³ and density 150kgm^-3. the density of mixture is?

A165kgm^-3

B100kgm^-3

C265kgm^-3

D350kgm^-3

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Question 23

jamb 2005

When the temperature difference between the wet and dry bulbs of a hygrometer is high, this indicates that

Ait is about to rain

Bthe relative humidity is high

Cthere is plenty of sunshine

Dthe relative humidity is low

View Explanation & Discuss

Question 24

jamb 2005

which of the following materials is a conductor?

AGlass

BWax

CSodium

DPlastic

View Explanation & Discuss

Question 25

jamb 2005

The current in a reverse-biased junction is due to?

Aminority carriers

Belectrons

Cmajority carriers

Dholes

View Explanation & Discuss

Question 26

jamb 2005

A transformer is rated 240v. If the primary coil is 4000 turns and the secondary voltage 12v, determine the number of turns in the secondary coil.

A200

B100

C250

D150

View Explanation & Discuss

Question 27

jamb 2005

The ray which causes gas molecules to glow is known as

Acathode ray

Banode ray

Cmolecular ray

Dgamma ray

View Explanation & Discuss

Question 28

jamb 2005

The charge carriers in gasses are

Aions only

Belectrons and ions

Celectrons and holes

Delectrons only

View Explanation & Discuss

Question 29

jamb 2005

A silicon material is dopped with an element of a certain group and an n-type semi-conductor is formed. the most likely group of the element is

BIII

DII

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Question 30

jamb 2005

When impurities are added to semi-conductors, the conductivity of the semi-conductor

Aincreases then decreases

Bincreases

Cdecreases

Dremains constant

View Explanation & Discuss

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