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4,719 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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4,719 questions

Question 1 of 20 4,719 total questions

Question 231

jamb 2023

What happens to the resistance of a wire when its length is doubled?

Adoubles

Bhalves

Cquadruples

Dstays same

Question 232

jamb 2023

The formula for work done is:

AForce ?? Distance

BForce ?? Time

CMass ?? Velocity

DPower ?? Time

Question 233

jamb 2023

Which of the following is a vector quantity?

Aspeed

Bmass

Cacceleration

Denergy

Question 234

jamb 2023

Speed is a measure of distance divided by:

Atime

Bforce

Cmass

Dpower

Question 235

jamb 2023

The SI unit of force is the:

AJoule

BNewton

CWatt

DPascal

Question 236

waec 2022

In which of the following situations is friction not useful?

AOperation of a grinding machine

BWalking

CApplication of brakes

DMoving piston in a sleeve

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Question 237

waec 2022

The basic principle of operation of a beam balance is------------------

AHooke's law

BArchimedes principle

Claw of flotation

Dprinciple of moments

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Question 238

waec 2022

Using venier calipers, which of the following readings gives the correct measurement for the length of a rod?

A4.1 cm

B4.13cm

C125 cm

D1254 cm

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Question 239

waec 2022

The viscosity of a fluid depends on the following factors except the?

Arelative motion between the layers of the fluid

Bnature of the material of the fluid

Csurface area of the fluid in contact

Dnormal reaction in the fluid

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Question 240

waec 2022

Molecules move in random motion within a liquid. The total internal energy of the liquid depends on all of the following except its?

Atemperature

Bmass

Cspecific heat capacity

Dmelting point

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Question 241

waec 2022

A small object of mass 50 g is released from a point A. Determine the velocity of the object when it reaches a point B, a vertical distance of 30m below A. [g = 10 ms\(^{-2}\)

A1.5 ms\(^{-1}\)

B6.0 m s\(^{-1}\)

C17.3 m s\(^{-1}\)

D24.5 m s\(^{-1}\)

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Question 242

waec 2022

A quantity of water at 0 °C is heated to 30 °C. For each degree rise in temperature, its density will---------

Arise steadily

Bfall steadily

Cfall and then rises

Drise and then falls

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Question 243

waec 2022

The engine of a car provides a forward force of 1240 N and the total resistive force on the car is 800N. If the mass of the car is 1220 kg, determine the distance the car has to travel from the rest before acquiring a speed of 4 m s\(^{-1}\).

A44.0 m

B22.2 m

C11.1 m

D5.5 m

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Question 244

waec 2022

Which of the folowing statements about light travelling from one material medium to another is not correct?

AIts wavelength does not change

BIt bends away from the normal if the speed is lower in the first material

DIts frequency changes.

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Question 245

waec 2022

Which of the following concepts is a method of heat transfer that does not require a material medium?

AConduction

BDiffusion

CConvection

DRadiation

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Question 246

waec 2022

The diameter of a brass ring at 30 °C is 50.0 cm. To what temperature must this ring be heated to increase its diameter to 50.29 cm? [ linear expansivity of brass = 1.9 x 10\(^{-5}\) K\(^{-1}\)]

A152.6 °C

B182.6 °C

C306.1 °C

D335.3 °C

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Question 247

waec 2022

Which of the following statements-about electromagnetic waves is not correct?

AThey carry energy as they travel through space

BThey travel with the speed of light

CThey are longitudinal

DThe electric and magnetic fields are at right angles to each other

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Question 248

waec 2022

The distance between the fixed points of a mercury-in-glass thermometer is 30 cm. Determine the temperature when the mercury level is 10.5 cm above the lower fixed point

A28.6ºC

B30.0 ºC

C35.0 ºC

D40.5 ºC

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Question 249

waec 2022

A hunter fires a gun at a point 408 m away from a cliff. If he hears an echo 2.4 s later, determine the speed of the sound wave

A340 ms\(^{-1}\)

B380 m s\(^{-1}\)

C400 m s \(^{-1}\)

D680 m s\(^{-1}\)

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Question 250

waec 2022

When the direction of vibration of the particles of a medium is perpendicular to the direction of propagation of a wave, the wave is said to be--------

Alongitudinal

Btransverse

Cmechanical

Da sound wave

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