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150 questions

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Question 71

jamb 2019

In a slide wire bridge, the balance is obtained at a point 25cm from one end of wire 1m long. The resistance to be tested is connected to that end and a standard resistance of 3.6\(\Omega\) is connected to the other end of the wire. Determine the value of the unknown resistance

A3.2\(\Omega\)

B1.4\(\Omega\)

C3.21\(\Omega\)

D1.2\(\Omega\)

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Question 72

jamb 2019

During the transformation of matter from the solid to the liquid state, the heat supplied does not produce temperature increase because

Aall the heat is used to break the bonds holding the molecules of the solid together

Bthe heat capacity has become very large as the substance melts

Cthe heat energy is quickly conducted away

Dthe heat gained is equal to the heat lost by the substance

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Question 73

jamb 2019

Lamps in domestic lightings are usually in

Aseries

Bdivergent

Cconvergent

Dparallel

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Question 74

jamb 2019

A train has an initial velocity of 44m/s and an acceleration of -4m/s\(^2\). Calculate its velocity after 10 seconds

A10m/s

B6m/s

C8m/s

D4m/s

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Question 75

jamb 2019

The value of T in the figure above is

A30N

B10.0N

C20N

D40N

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Question 76

jamb 2019

According to kinetic molecular model, in gases

AThe molecule are very fast apart & occupy all the space made available

BThe particles occur in clusters with molecules slightly farther apart

CThe particles vibrate about fixed positions and are held together by the strong intermolecular bond between them

DThe particles are closely packed together, they occupy minimum space & are usually arranged in a regular pattern

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Question 77

jamb 2019

A metal rod has a length of 100cm at 200\(^oC\). At what temperature will its length be 99.4cm. If the linear expansivity of the material of the rod is 2 x 10\(^{-5}C^{-1}\)

A200\(^o\)C

B300\(^o\)C

C100\(^o\)C

D-100\(^o\)C

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Question 78

jamb 2019

When blue and green colours of light are mixed, the resultant colour is

Acyan

Bmagenta

Cblack

Dyellow

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Question 79

jamb 2019

If a body moves with a constant speed and at the same time undergoes an acceleration, its motion is said to be

Aoscillation

Bcircular

Crotational

Drectilinear

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Question 80

jamb 2019

The limiting frictional force between two surface depends on

I. the gaseous reaction between the surfaces

II. the nature of the surfaces in contact

III. the relative velocity between the surfaces

AI only

BI & IV only

CII only

DIII only

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