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49 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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49 questions

Question 1 of 20 49 total questions

Question 11

jamb 2010

Two inductors of inductance 5 mll and 15 mll are connected in series and a current of 5A flows through them. the total energy stored in the inductor is?

A500.0J

B250.0J

C62.5J

D50.0J

Eno correct option

View Explanation & Discuss

Question 12

jamb 2010

A galvanometer with full-scale deflection of 10 mA is to be converted to a voltmeter with full-scale deflection of 5v. if a series resistance of 498Ω is used for the conversion, the resistance of the galvanometer is ?

A1Ω

B2Ω

C5Ω

D10Ω

View Explanation & Discuss

Question 13

jamb 2010

Power supply is transmitted at a very high voltage and low current in order to?

Amake pass through the trasformers

Bincrease the power supply

Cmake it travel fast

Dprevent overheating of the coil

View Explanation & Discuss

Question 14

jamb 2010

When a positively charged rod is brought nearer the cap of a positively charged electroscope, the leaves divergence will?

Abe induced

Bconverge

Cdiverge

Dremain constant

View Explanation & Discuss

Question 15

jamb 2010

Dispersion occurs when white light passes through a glass prism because of the?

Adifferent hidden colours in the glass

Bdifferent speeds of the colour in the glass

Cdefects in the glass

Dhigh density of the glass

View Explanation & Discuss

Question 16

jamb 2010

Which of the following is used for the correction of short sightedness?

Aconvex lens

Bconcave lens

Cconvex mirror

Dconcave mirror

View Explanation & Discuss

Question 17

jamb 2010

An object is embedded in a block of ice, 10 cm below the plane surface. if the refractive index of the ice is 1.50, the apparent depth below the surface is?

A2.50 cm

B6.67 cm

C7.50 cm

D7.63 cm

View Explanation & Discuss

Question 18

jamb 2010

An object 4 cm high is placed 15 cm from a concave mirror of focal length 5 cm. The size of the image is?

A2 cm

B3 cm

C4 cm

D5 cm

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Question 19

jamb 2010

In comparing the camera and the human eye, the film of the camera function as the?

Aretina

Biris

Ccornea

Dpupil

View Explanation & Discuss

Question 20

jamb 2010

During a thunderstorm, the sound is heard over a long time. this phenomenon is referred to as?

Adiffraction of sound

Brefraction of sound

Csuperposition

Dreveraberation

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Question 21

jamb 2010

The sound of an electricity bell dies down slowly when air is slowly pumped out from a bottle because

Athe wavelength of sound becomes greater in the bottle

Bsound cannot pass through the bottle

Csound needs a material medium

Dsound can pass through a vacuum

View Explanation & Discuss

Question 22

jamb 2010

The wavelength of a wave traveling with a velocity of 420 ms\(^{-1}\) is 42 m. What is its period?

A1.2 s

B1.0 s

C0.5 s

D0.1 s

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Question 23

jamb 2010

Which of the following has no effect on radiation?

Anature of surface

Bdensity

Csurface area

Dtemperature

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Question 24

jamb 2010

The pressure of one mole of an ideal gas of volume 10\(^-2\) m\(^3\) at a temperature of 27°c is
[molar gas c J mol\(^{-1}\) k\(^{-1}\)]

A2.49 x 10⁴ Nm^-2

B2.24 x 10⁴ Nm^-2

C2.49 x 10⁵ Nm^-2

D2.24 x 10⁵ Nm^-1

View Explanation & Discuss

Question 25

jamb 2010

A vapor is said to be saturated when?

Aa dynamic equilibrium exists between liquid molecules and the vapour molecules

Ba dynamic equilibrium exists such that more molecules return to the liquid than are leaving it

Cthe temperature of the vapour varies

Dthe vapour pressure is atmospheric

View Explanation & Discuss

Question 26

jamb 2010

The small droplet of water that forms on the grass in the early hours of the morning is

Ahail

Bdew

Cfog

Dmist

View Explanation & Discuss

Question 27

jamb 2010

If a container is filled with ice to the brim, what happens to the level of water when the ice completely melts?

Athe level of water goes up

Bthe water in the glass outflows

Cthe level of water remains unchanged

Dthe level of water drops

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Question 28

jamb 2010

Heat is radiated by hot objects in the form?

Ax-rays

Blight energy

Cinfrared rays

Dsolar energy

View Explanation & Discuss

Question 29

jamb 2010

The density of a certain oil on frying becomes 0.4 kgm\(^{-3}\) with the volume of 20m\(^{3}\). what will be its initial volume when its initial density is 0.8 kgm\(^{-3}\) assuming no loss of oil due to spillage?

A12m³

B10m³

C8m³

D5m³

View Explanation & Discuss

Question 30

jamb 2010

One special advantage of alcohol over mercury as a thermometric liquid is its?

Alow density

Blow freezing point

Chigh specific

Dlow boiling point

View Explanation & Discuss

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