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4,719 questions

Question 1 of 20 4,719 total questions

Question 261

jamb 2022

A train of mass 1600 kg attains a speed of 25 ms\(^{-1}\) in 20 seconds. The power developed in the engine is?

A2.5 KW

B80 KW

C25 KW

D50 KW

View Explanation & Discuss

Question 262

jamb 2022

What quantity of heat is required to convert 20 g of ice at 0 ºC to water at the same temperature? (Specific latent heat of ice = 336 Jg\(^{-1}\))

A7.06 x 10\(^{3}\)J

B5.38 x 10\(^{3}\)J

C6.72 x 10\(^{3}\)J

D1.35 x 10\(^{3}\)J

View Explanation & Discuss

Question 263

jamb 2022

The graph of pressure (P) against the reciprocal of the volume (I/V) in Boyles's law is a?

Ahyperbola

Bparabola

Ccurve

Dstraight line

View Explanation & Discuss

Question 264

jamb 2022

Which expression gives magnetic flux?

AqVB sin\(\theta\)

B\(\frac{\mu \phi I}{2 \pi r}\)

CBA cos \(\theta\)

D-N \(\frac{d \phi}{dt}\)

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Question 265

jamb 2022

The amount of energy required to change a kilogram of ice block into water without a change in temperature is?

Aspecific latent heat of fusion of ice

Bspecific heat capacity of ice

Cheat capacity of ice

Dspecific heat of vaporization of ice

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Question 266

jamb 2022

The gravitational pull on the moon is \(\frac{1}{6}\) that of the earth. If a body weighs 6.0 N on the moon, what will be the weight on the earth?

A6.0 N

B5.0 N

C12.0 N

D36.0 N

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Question 267

jamb 2022

The eclipse of the moon occurs when?

Athe moon reflects the rays from the sun to the earth

Bthe moon comes exactly between the earth and the sun

Cthe earth comes exactly between the moon and the sun

Dthe sun comes exactly between the earth and the moon

View Explanation & Discuss

Question 268

jamb 2022

In order to view the sun, the most suitable instrument to use is?

Ahelioscope

Btelescope

Cstroboscope

Dsun meter

View Explanation & Discuss

Question 269

jamb 2022

Which component of fiber-optic connector has a provision of entry for the fibre along with the fixation to connector housing?

Acoupling device

Bcable

Cferrule

Dconnector housing

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Question 270

jamb 2022

In the formation of sea breeze, wind blows from?

Asky to land

Bsea to sky

Cland to sea

Dsea to land

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Question 271

jamb 2022

Which of these is a second-class lever?

Asugar tongs

Bclaw hammer

Cplier

Dwheelbarrow

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Question 272

jamb 2022

Water is not a good thermometric liquid because it?

Aexpands unevenly between 0 ºC and 4 ºC

Bmaintains fixed density

Chas low freezing point

Dwets glass

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Question 273

jamb 2022

A reservoir is filled with liquid of density 2000 kgm\(^{-1}\). Calculate the depth at which the pressure in the liquid will be equal to 9100 Nm\(^{-2}\) (g = 10 ms\(^{-2}\))

A0.262 m

B0.664 m

C0.819 m

D0.455 m

View Explanation & Discuss

Question 274

jamb 2022

The potential energy in an elastic string of force constant k, which has an extension X is?

AkX

BKX\(^{2}\)

C½KX\(^{2}\)

D½K

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Question 275

jamb 2022

The vapour pressure?

Aincreases non-linearly with measuring temperature

Bincreases linearly with increasing temperature

Cdecreases linearly with increasing temperature

Ddecreases non-linearly ith measuring temperature

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Question 276

jamb 2022

For a pear-shaped conductor shown above, the concentration of charge on the outside is highest at?

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Question 277

jamb 2022

A current of 0.5 A flows through a resistor when connected to a 40 V battery. How much energy is dispatched in 2 minutes?

A2400 J

B9600 J

C1500 J

D1200 J

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Question 278

jamb 2022

According to kinetic molecular model in gases,

Athe particles are closely packed together; they occupy minimum space are usually arranged in a regular pattern

Bthe particles vibrate about fixed positions and are held together by the strong intermolecular bonds between them

Cthe molecules are very far apart and occupy all the spaces made available to them

Dthe particles occur in clusters with molecules slightly further apart

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Question 279

jamb 2022

A magnet relay is a device used for?

Areading the magnitude of magnetic flux

Bcontrolling another circuit carrying larger current

Cturning in sports

Dstoring magnetic field

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Question 280

jamb 2022

When the plate area of a capacitor increases?

Athe voltage can withstand increase

Bthe capacitance decreases

Cthe capacitance is unaffected

Dthe capacitance increases

View Explanation & Discuss

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