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2,483 questions

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Question 51

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\(^3\)

View Explanation & Discuss

Question 52

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

View Explanation & Discuss

Question 53

jamb 2025

The power of a lens in diopters is

A3f

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

C2f

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Question 54

jamb 2025

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

ARed

BBlue

CYellow

DViolet

View Explanation & Discuss

Question 55

jamb 2024

A boy standing 408m from a wall blew a trumpet and heard the echo 2.4s later. Calculate the speed of the sound

A310m/s

B320m/s

C330m/s

D340m/s

View Explanation & Discuss

Question 56

jamb 2024

The dimension of power is

AML\(^2\)T\(^{-3}\)

BML\(^1\)T\(^2\)

CML\(^2\)T\(^{-2}\)

DMLT\(^2\)

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Question 57

jamb 2024

An example of a non-rechargeable cell is

Anickel iron

Bmercury cadmium

Cdry leclanche

Dlead-acid

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Question 58

jamb 2024

The acceleration of a free fall due to gravity is not a constant everywhere on the Earth's surface because

Amass of the earth

Belliptical shape of the earth

Cvariation in the density of the earth

Drotation of the earth about its axis

View Explanation & Discuss

Question 59

jamb 2024

Find the amount of current required to deposit 0.02kg of metal in a given electrolysis for 120 seconds. [electro chemical equivalent of the metal = 1.3 x 10\(^{-7}\)kgC\(^{-1}\)]

A7.8 x 10\(^{-4}\)A

B7.8 x 10\(^{-2}\)A

C1.3 x 10\(^3\)A

D1.3 x 10\(^5\)A

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Question 60

jamb 2024

Using the circuit above, at resonance

AV\(_L\) = V\(_R\)

BV\(_R\) = V\(_R\)

CV\(_L\) = V\(_L\)

DV\(_L\) = V\(_C\)

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Question 61

jamb 2024

Photometer is used to measure

AKinetic energy of liberated electrons

BIntensity of light

Cfrequency of light

Dwavelength of light

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Question 62

jamb 2024

As per Faraday's laws of electromagnetic induction, an e.m.f is induced in a conductor whenever

Alies parallel to the magnetic flux

Blies in a magnetic field

Clies out side but close to a magnetic field

Dcuts magnetic flux

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Question 63

jamb 2024

One of these is not the use of an electroscope

Atesting the type of charge on a charge body

Bmeasuring ionization current in air

Cdetecting the pressure of charge on a charged body

Dproducing electric charge in a body

View Explanation & Discuss

Question 64

jamb 2024

The bursting of water pipes during very cold weather, when the water in the pipes form ice could be attributed to

Acontraction of pipes when cooled

Bexpansion of water on freezing

Ccontraction of water on freezing

Dexpansion of ice on melting

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Question 65

jamb 2024

The velocity ratio of an inclined plane at 60º to the horizontal is

A1.055

B1.155

C1.255

D2.00

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Question 66

jamb 2024

The device for measuring the angle of dip is

ADip circle

BDip inclination

CDip variation

DDip meter

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Question 67

jamb 2024

The diaphragm in the camera is similar to what part of the eyes?

ACornea

BLens

CCiliary muscle

DIris

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Question 68

jamb 2024

In the diagram above, the galvanometer is converted to

AVoltmeter

BAmmeter

CVoltameter

DHypsometer

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Question 69

jamb 2024

An air force jet flying with a speed of 335m/s went past an anti-aircraft gun. How far is the aircraft 5s later when the gun was fired?

A838m

B1675m

C670m

D3350m

View Explanation & Discuss

Question 70

jamb 2024

Two points on a velocity-time graph have coordinates (2s, 5m/s) and (4s, 15m/s). Calculate the mean acceleration

A5.0ms\(^2\)

B0.83ms\(^2\)

C1.5ms\(^2\)

D2.0ms\(^2\)

View Explanation & Discuss

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