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45 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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45 questions

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Question 21

jamb 1983

The refractive index of liquid is 1.5. If the velocity of light in vacuum is 3.0 x 108ms-1, the velocity of light in the liquid is

A1.5 x 10⁸m^-1

B2.0 x 10⁸m^-1

C3.0 x 10⁸m^-1

D4.5 x 10⁸m^-1

E9.0 x 10⁸m^-1

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Question 22

jamb 1983

The force with which an object is attracted to the earth is called its

Aacceleration

Bmass

Cgravity

Dimpulse

Eweight

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Question 23

jamb 1983

Which of the following statements about friction is NOT correct?

AThe force of kinetic friction is less than the force of static friction

BThe force of kinetic friction between two surfaces is independent of the areas in contact provided the normal reaction is unchanged

CThe force of rolling friction between two surfaces is less than the force of sliding friction

DThe angle of friction is the angle between the normal reaction and the force of friction

EFriction may be reduced by lubrication

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Question 24

jamb 1983

Which of the following is NOT a vector quantity?

AForce

BAltitude

Cweight

DDisplacement

EAcceleration

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Question 25

jamb 1983

In a resonance tube experiment, a tube fixed length is closed at one end and several tuning forks of increasing frequency used to obtain resonance at the open end. If the tuning fork with the lowest frequency which gave resonance had a frequency f1 and the next tuning fork to give resonance had a frequency f2, find the ratio \(\frac{f^2}{f^1}\).

D\(\frac{1}{2}\)

E\(\frac{1}{3}\)

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