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185 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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185 questions

Question 1 of 20 185 total questions

Question 81

jamb 2024

If the S.V.P of water vapour was 13.5mmHg at 33ºC and 7.3mmHg at 7ºC. Find the percentage relative of the air on a day when average air temperature was 33ºC and dew point was 7ºC.

A55%

B60%

C54%

D51%

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Question 82

jamb 2024

5 X 10\(^{-3}\)kg of liquid at its boiling point is evaporated in 20s by the heat generated by a resistor of 2\(\Omega\) when a current of 10A is used. The specific latent heat of vaporization of the liquid is

A8.0 x 10\(^4\)Jkg\(^{-1}\)

B8.0 x 10\(^5\)Jkg\(^{-1}\)

C8.0 x 10\(^6\)Jkg\(^{-1}\)

D8.0 x 10\(^7\)Jkg\(^{-1}\)

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Question 83

jamb 2024

The value of R required to make the galvanometer measure voltage up to 40V in the diagram above

A1885\(\Omega\)

B1990\(\Omega\)

C1995\(\Omega\)

D1100\(\Omega\)

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Question 84

jamb 2024

A solid cube of aluminum is 1.5cm on each edge. The density of aluminum is 2700kgm\(^{-1}\). Find the mass of the cube.

A7.5g

B9.1g

C12.0g

D15.0g

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Question 85

jamb 2024

A light ray passing from air into water at an angle of 30º from the normal in air would

Amake an angle greater than 30\(^0\) in water surface

Bbe completely absorbed by the water surface

Cbe completely reflected by the water surface

Dmake an angle less than 30\(^0\) from the normal in water

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Question 86

jamb 2024

Pilots uses aneroid barometer to know the height above sea level because

AVery accurate

BSmall and convenient

CHeavy and huge

DCostly

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Question 87

jamb 2024

When a charged ebonite rod is brought near a charged glass rod, there will be

Aattraction

Brepulsion

Cspark

Dno force experienced

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Question 88

jamb 2024

Which of the following operates based on magnetic effect of electric current?

Aelectric heater

Bphotocell

CDynamo

DCold cathode

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Question 89

jamb 2024

The friction due to air mass can be reduced by

Astreaming

Blubricating

Cpropeller

Dpolishing

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Question 90

jamb 2024

When a bus is accelerating, it must be

Achanging its speed

Bchanging its velocity

Cchanging its position

Dchanging its direction

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Question 91

jamb 2024

Find the value of a capacitor with voltage 5V and 30C.

A7f

B6f

C15f

D0.17f

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Question 92

jamb 2024

Rainbow is formed when sunlight undergoes

Areflection

Brefraction

Cdispersion

Ddiffraction

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Question 93

jamb 2024

The mechanical advantage of the machine shown above

A7.5

B15.5

C30.0

D60.0

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Question 94

jamb 2024

Under which conditions is work done

AA man supports a heavy load on his head with hands.

BA woman holds a pot of water

CA boy climbs onto a table

DA man pushes against a stationary petrol tanker

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Question 95

jamb 2024

The stress experienced by a wire of diameter \(\frac{\text{y}}{\pi}\)m loaded by a weight y\(^2\)N is

A\(\pi\)Nm\(^{-2}\)

B2\(\pi\)Nm\(^{-2}\)

C4\(\pi\)Nm\(^{-2}\)

D8\(\pi\)Nm\(^{-2}\)

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Question 96

custom 2024

A battery provides which type of current?

Aneither

Bboth

CAC

DDC

Question 97

custom 2024

The gravitational force on Earth pulls objects

Asideways

Bdownwards

Cno direction

Dupwards

Question 98

custom 2024

Which of these is the unit of work?

Ajoule

Bohm

Cweber

Dpascal

Question 99

custom 2024

Sound cannot travel through a

Aliquid

Bsolid

Cgas

Dvacuum

Question 100

custom 2024

The opposite of speed is not a physical quantity; which of these is a vector?

Atime

Bspeed

Cvelocity

Ddistance

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