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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 2051

waec 1989

A piece of cork floating on water is acted upon by the forces of...

AWeight and viscosity

Bweight and upthrust

Cupthrust and viscosity

Dweight only

Eupthrust only

View Explanation & Discuss

Question 2052

waec 1989

A block of material of volume 20cm^-3 and density 2.5gcm^-3 is suspended from a spring balance with half the volume immersed in water. What is the reading of the spring balance? (Density of water = 1.0gcm^-3).

A8g

B25g

C30g

D40g

E50g

View Explanation & Discuss

Question 2053

waec 1989

Which of the following is used to determine the relative density of the acid in a car battery?

AHypsometer

BHygrometer

CManometer

DHydrometer

ESpectrometer

View Explanation & Discuss

Question 2054

waec 1989

A boy pulls a nail from the wall with a string tied to the nail. The string is inclined at an angle of 60^o to the wall. If the tension in the string is 4N, what is the effective force used in pulling the nail?

A2√3 N

B4 N

C4√3 N

D8 N

E2 N

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Question 2055

waec 1989

Which of the following is not a consequence of a force field?

Awieght

Bsurface tension

Cgravitational pull

Dmagnetic force

Eelectric force

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Question 2056

waec 1989

Which of the following is NOT a vector quantity?

Amomentum

Bforce

Cvelocity

Dtemperature

Edisplacement

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Question 2057

jamb 1989

A beam of radiation is passed between a pair of charged plates as indicated in the fig above. Beam P is undetected While Q is deflected to the left. P and Q respectively should be

I.γ-rays β-rays
II. x-rays β-rays
III. γ-rays x-rays
IV. x-rays x-rays

AI only

BIII only

CI and II

DIII and IV

View Explanation & Discuss

Question 2058

jamb 1989

The fig above shows a conductor PQ carrying a current I in the direction shown. At a particular position near the conductor is a compass needle K. Neglecting the earth's magnetic field, the compass needle will

Asettle in any direction

Bsettle in a fixed direction only if the conductor PQ is a magnetic material

Csettle in a fixed direction WHETHER the conductor PQ is a magnetic material OR NOT

Dbe stationary

View Explanation & Discuss

Question 2059

jamb 1989

The total power drawn from the cell in the circuit above is

A12W

B24W

C32W

D40W

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Question 2060

jamb 1989

Three 2-µF capacitors are arranged as seen in the circuit above . The effective capacitance between E and F is

A0.75µF

B1.33µF

C3.00µF

D6.00µF

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Question 2061

jamb 1989

In the above circuit diagrams A is the ammeter and V is the Voltmeter. Which of the circuits is correct for finding the correct value of the resistance R

BII

CIII

DIV

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Question 2062

jamb 1989

The air column as shown above is set into vibration by the turning fork. In this State of resonance, the waves in the air column will be

Astationary and transverse

Bstationary and longitudinal

Cprogressive and transverse

Dprogressive and longitudinal

View Explanation & Discuss

Question 2063

jamb 1989

In the fig above W\(_1\) = 200g, and W\(_2\) =450g. Calculate the extension of the spring per unit load.
[g = 10ms\(^{-2}\)]

A6.0 x 10^-5mN^-1

B2.5 x 10^-4mN^-1

C6.0 x 10 ^-3mN^-1

D2.5 x 10 ^-2mN^-1

View Explanation & Discuss

Question 2064

jamb 1989

A block of mass m is held in equilibrium against a vertical wall by a horizontal force. If the coefficient of friction between the wall and the block is µ, the minimum value of the horizontal force is

Aµmg

B(1-µ)mg

C(1+µ)mg

Dmg/µ

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Question 2065

jamb 1989

A simple pendulum of mass m moves along an arc pf a circle radius R in a vertical plane as shown above. What is the work done by gravity in a downward swing through the angle q to 0 degree

AmgR sinθ

BMgR (1- cos θ)

CmgR

DmgR (1 - sinθ)

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Question 2066

jamb 1989

The fig above shows a uniform circular object, center R and diameter PS. A circular section 6 and Diameter PR is cut from it. if PQRS is a straight line, where is center of gravity of the figure

CA point between P and R

DA point between R and S

View Explanation & Discuss

Question 2067

jamb 1989

The function of a 5-A fuse included in a circuit supplying a household refrigerator with power is to keep the

ATemperature of the refrigerator low and constant

Bkeep current supplied to the refrigerator below 5A

CVoltage supply constant

DCurrent supplies to the refrigeration

View Explanation & Discuss

Question 2068

jamb 1989

An object is placed at 5.6 x 10\(^{-4}\)m in front of a converging lens of focal length 1.0 x 10\(^{-n}\)m. The image formed is

AReal, Erect and magnified

BVirtual, erect and magnified

CReal, inverted and magnified

DVirtual, erect and diminished

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Question 2069

jamb 1989

Eight alpha decays and six beta decays are necessary before an atom of 2 \(^{238}_{92}U\) achieves stability. The final product in the chain has an atomic number of

A70

B78

C82

D90

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Question 2070

jamb 1989

Which of the following is TRUE of the particles emitted in radioactive disintegration?

Athe beta particle is the helium nucleus H

Bthe alpha particle is lighter than the beta particle

Cthe alpha particle is deflected more than the beta particle in a magnetic field

Dthe beta particle is deflected more than the alpha particle in a magnetic field

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