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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 2331

jamb 1979

If the wavelength of a wave travelling with a velocity of 360ms-1 is 60m, the period of the wave is

A6s

B3.6s

C0.17s

D0.61s

E3s

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Question 2332

jamb 1979

When the vapour of a substance is in equilibrium with its own liquid, it is said to be

Agaseous

Bunsaturated

Cliquefied

Ddiffused

Esaturated

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Question 2333

jamb 1979

In what range of temperature is the expansion of water anomalous?

A+208^oC to +212^oC

B-80^oC + -76^oC

C-4^oC to 0^oC

D+96^oC to +100^oC

E0^oC to +4^oC

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Question 2334

jamb 1979

If in a simple pendulum experiment the length of the inextensible string is increased by a factor of four, its period is increased by a factor of

B\(\frac{\pi}{2}\)

C\(\frac{1}{4}\)

D2\(\pi\)

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Question 2335

jamb 1979

Which of the following types of waves cannot travel through a vacuum?

Asound waves

Blight waves

Cinfra-red waves

Dx-radiation

Eradio waves

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Question 2336

jamb 1979

The temperature at which the water vapour present in the air saturates the air and begins to condense is known as

Aboiling point

Bmelting point

Ctriple point

Ddew point

Ecritical temperature

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Question 2337

jamb 1979

Two closed vessels contain equal volumes of boiling water and are identical except that one is blackened on the outside while the other is polished. Which of the following is correct?

Athe polished vessel will cool faster because a polished surface is a good radiator

Bthe polished vessel will cool faster because it will absorbe less heat from the room

Cthe black vessel will cool faster because it is a better conductor of heat

Dthe polished vesselwill cool faster because it reflects heat better

Ethe black vessel will cool faster because a black surface radiates heat faster than a polished one

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Question 2338

jamb 1979

A 500kg car which was initially at rest travelled with an acceleration of 5m sec^-2, its kinetic energy after 4 seconds was

A10⁵J

B2.5 x 10³J

C2 x 10³J

D5 x 10³J

E5 x 10^5J`

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Question 2339

jamb 1979

Which of the following statements defines correctly the efficiency of a machine?

Athe load carried by the machine divided by effort required in carrying the load

Bthe distance moved by the load divided by the distance moved by the effort

Cthe useful work done by the machine divided by the total work put into the machine

Dthe movement of the load divided by the movement of the effort about the same point

Ethe temperature at the end of the application of the machine divided by the initial temperature

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Question 2340

jamb 1979

The density 400cm³ of palm oil was 0.9gcm^-3 before frying. If the density of the oil was 0.6gm^-3 after frying,assuming no loss of oil due to spilling, its new volume was

A360cm³

B600cm³

C240cm³

D800cm³

E450cm³

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Question 2341

jamb 1978

An object is positioned between two plane mirrors inclined at right angles to each other. The object is 1 unit from each mirror. The number of images formed is

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Question 2342

jamb 1978

The equivalent capacitance for the circuit drawn above is

A18µf

B4µf

C2µf

D12µf

E13µf

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Question 2343

jamb 1978

In The Diagram, what is the value of W

A5N

B10N

C15N

D20N

E30N

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Question 2344

jamb 1978

Two lamps are rated 40W and 220V each are connected in series. The total power dissipated in both lamps is

A10W

B20W

C40W

D80W

ENone of the above

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Question 2345

jamb 1978

The amount of heat required to raise the temperature of a body is

AThermal energy

Bthermal conduction

Cheat loss

Dspecific heat capacity

Ethermal capacity

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Question 2346

jamb 1978

The net charge on the atom is zero because

Athe electrons and the protons that are charged are in the nucleus

Bthe total charge on the electrons is equal to the total charge on the protons

Cthe neutrons from a shield around the charged protons

Dthe number of electrons in an atom is half the number of protons

EA and B above

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Question 2347

jamb 1978

Of the following which is different from the other?

Ax-rays

Bgamma-rays

Ccathode rays

Dultra violet rays

Einfrared rays

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Question 2348

jamb 1978

For the correction of myopic defects in the human eye we require

Aa convex lens

Ba concave lens

Ca combination of concave and convex lenses

Da prism

Ea concave mirror

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Question 2349

jamb 1978

A string is sustaining a stationary wave when

Athe frequency of the wave is not proportional to the wavelength of the wave

Bthe amplitude of vibration is always zero

Ctwo equal waves are travelling in opposite directions

Dthe waves are longitudinal

Ethe frequency is directly proportional to the length of the string

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Question 2350

jamb 1978

Which of the following is true for the image formed by a convex mirror? i. the image is always virtual ii. the image is always erect iii. the image lies between pole and focus iv. the image is never magnified v. the focus length is negative

Ai only

Bi and ii only

Cii and iii only

Di, ii, iii and iv only

Eall five

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