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154 questions

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Question 71

jamb 2025

A Force 18 N pulls a 40 kg mass on a horizontal floor at 0.3 ms\(^{-2}\). Find the coefficient of friction.

A0.003

B0.015

C0.300

D0.600

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Question 72

jamb 2025

I. The colour of light depends on its frequency II. When white light is dispersed by a triangular prism, yellow is deviated more than green III. Rainbows are formed when rains fall heavily. Which of the above statements is/are correct about dispersion and colours?

AI and III only

BI only

CII and III only

DI and II only

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Question 73

jamb 2025

The diagram above shows a magnetic field due to a

Asolenoid

Bcircular coil

Ccurrent-carrying straight conductor

Dthe earth's meridian

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Question 74

jamb 2025

When both the object and its image move together in the same direction relative to the observer, then there is

Ano parallax error

Bblurred image

Cmechanical error

Dparallax error

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Question 75

jamb 2025

Some of the features of the human eye that greatly help to refract light entering the eyes are

Acornea and lens

Bcornea and aqueous humor

Clens and vitreous humor

Daqueous humor and lens

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Question 76

jamb 2025

The thermometric property of mercury is best on the change in

Adensity with temperature

Bvolume with temperature

Cpressure with temperature

Dresistance with temperature

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Question 77

jamb 2025

The emf of a cell is the potential difference across its terminals when it is in

Aseries connection

Bclosed circuit

Copen circuit

Dparallel connection

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Question 78

jamb 2025

Which of the following is not true about a wave in a plucked string?

AIt is mechanical

BIt has a crest

CIt is transverse

DIt is longitudinal

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Question 79

jamb 2025

According to the kinetic theory of gases, the pressure exerted by a gas on the walls equals.

AMomentum imparted to the walls per unit area.

BChange in momentum per unit volume.

CChange in momentum imparted to the walls per unit area.

DRate of change of momentum imparted to the walls per second per unit area.

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Question 80

jamb 2025

The graphical representation of the pressure law is always a straight line passing through the origin, only if the temperature scale is

ARankine

BCelsius

CFahrenheit

Dthermodynamic

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Question 81

jamb 2025

The density of water is 1g/cm\(^3\) while that of ice is 0.9g/cm\(^3\). Calculate the change in volume when 90g of ice is completely melted.

A9cm\(^3\)

B90cm\(^3\)

C0cm\(^3\)

D10cm\(^3\)

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Question 82

jamb 2025

A man moves 6.0m East and then 10.0m N30ºE. How far is he from his starting point?

A15.0m

B17.0m

C14.0m

D12.0m

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Question 83

jamb 2025

The power of a lens in diopters is

A3f

B\(\frac{1}{\text{f}}\)

C2f

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Question 84

jamb 2025

Which of these colours in the visible spectrum has the longest wavelength?

ARed

BBlue

CYellow

DViolet

View Explanation & Discuss

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