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

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4,719 questions

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Question 271

jamb 2022

A tuning fork having a frequency of 312 Hz emits a wave which has a wavelength of 1.10 m. Calculate the velocity of sound

A312.0 ms\(^{-1}\)

B110.0 ms\(^{-1}\)

C343.2 ms\(^{-1}\)

D686.4 ms\(^{-1}\)

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Question 272

jamb 2022

A person standing waist-deep in a swimming pool appears to have short legs because of light?

Adiffraction

Brefraction

Creflection

Dinterference

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Question 273

jamb 2022

The secondary pigments consist of?

Ablue, green, and violet

Byellow, green, and magenta

Cmagenta, yellow, and cyan

Dred, green, and blue

View Explanation & Discuss

Question 274

jamb 2022

An isotope has an initial activity of 120 Bq. 6 days later its activity is 15 Bq. The half-life is?

A3 days

B2 days

C1 day

D4 days

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Question 275

jamb 2022

Which of the following liquid is a poor conductor of electricity?

ADistilled water

BTap water

CSea water

DDrinking water

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Question 276

jamb 2022

A cell whose internal resistance is 0.55\(\Omega\) delivers a current of 4 A to an external resistor. The lost voltage of the cell is?

A4.00 V

B2.20 V

C0.15 V

D8.00 V

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Question 277

jamb 2022

Which of the following is not a consequence of hydrogen bubbles covering the copper plate of a primary cell?

Aformation of hydrogen bubbles on the electrode

Bincrease in the resistance of the cell

Clocal action

Dpolarization

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Question 278

jamb 2022

The relationship between the coefficient of linear expansion \(\alpha\) and volumetric expansion (\(\gamma\)) is-----------------

A\(\gamma\) = \(\alpha ^{-3}\)

B\(\gamma\) = \(\alpha\)

C3\(\alpha\)

D\(\gamma\) = \(\alpha ^{3}\)

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Question 279

jamb 2022

A car starts from rest and covers a distance of 40 m in 10 s. Calculate the magnitude of its acceleration

A3.20 ms\(^{-2}\)

B0.25 ms\(^{-2}\)

C0.80 ms\(^{-2}\)

D4.00 ms\(^{-2}\)

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Question 280

jamb 2022

Tyres are treaded to?

Aincrease weight of tyres

Bincrease friction

Cincrease its longevity

Dlook good

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Question 281

jamb 2022

A bar magnet is placed near and lying along the axis of a solenoid connected to a galvanometer. The pointer of the galvanometer shows no deflection when?

Athe magnet is moved towards the stationary solenoid

Bthere is no relative motion

Cthe magnet is moved away from the stationary solenoid

Dthe solenoid is moved away from the stationary magnet

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Question 282

jamb 2022

An object 40 cm high is 30cm from the pin hole camera. If the height of the image formed is 20 cm. What is the distance of the image from the pin height?

A15 cm

B70 cm

C40 cm

D40 cm

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Question 283

jamb 2022

Consider the wave equation y = 5mm sin [1cm\(^{-1}\)x - 60s\(^{-1}\)t]. The wave number is?

A0.1 cm\(^{-1}\)

B10cm\(^{-1}\)

C1.0cm\(^{-1}\)

D2cm\(^{-1}\)

View Explanation & Discuss

Question 284

jamb 2022

A bar magnet is divided into two pieces, which of the following statement is correct?

Atwo new magnets are created

Bthe magnetic field of each separate piece becomes stronger

Cthe electric field is created

Dthe bar magnet is demagnetized

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Question 285

jamb 2022

Which of these is a derived unit?

AKilogram

BMetre

CNewton

DSecond

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Question 286

jamb 2022

The refractive index of a medium is the ratio of

Aspeed of light in vacuum to speed in medium

Bspeed in medium to speed in vacuum

Cfrequency to wavelength

Dwavelength to frequency

Question 287

jamb 2022

The SI unit of electric current is the

Aampere

Bvolt

Ccoulomb

Dohm

Question 288

jamb 2022

Which device converts mechanical energy to electrical energy?

Acapacitor

Btransformer

Cmotor

Dgenerator

Question 289

jamb 2022

Sound waves are

Alongitudinal

Bstationary

Ctransverse

Delectromagnetic

Question 290

jamb 2022

Which is a scalar quantity?

Avelocity

Bdisplacement

Cdistance

Dforce

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