AKUEB HSSC-I Physics AKU-EB Model Paper 2026 - Practice Online

Class 11 - Physics / Unit 10 - Thermodynamics / 10.7 Reversible and Irreversible Process / 10.7.1

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All of the following are the examples of reversible process EXCEPT

boiling of raw eggscompression of a helical springslow compression of oxygen gasfreezing of a carbonated drink into ice

Class 11 - Physics / Unit 10 - Thermodynamics / 10.4 Internal Energy and Work / 10.4.3

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In thermodynamics, when any two objects are rubbed together, then their internal energy will

increasedecreasebecome zeroremain constant

Class 11 - Physics / Unit 10 - Thermodynamics / 10.8 Second Law of Thermodynamics / 10.8.1

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According to the 2nd law of thermodynamics, heat can be converted into mechanical work if the system contains

two heat reservoirs at the same temperaturetwo heat reservoirs at different temperaturesan engine and a heat reservoir at the same temperaturean engine and two heat reservoirs at different temperatures

Class 11 - Physics / Unit 10 - Thermodynamics / 10.5 First Law of Thermodynamics / 10.5.2

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A thermodynamics process in which an ice cube starts melting and converts into water droplets while keeping the temperature of its surrounding constant is called an

isobaric processisochoric processadiabatic processisothermal process

Class 11 - Physics / Unit 10 - Thermodynamics / 10.2 Fundamentals of the Ideal Gas / 10.2.1

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According to Boyle's law, volume is inversely proportional to pressure of a gas at constant
I. mass
II. density
III. temperature

I onlyII onlyI and IIIII and III

Class 11 - Physics / Unit 10 - Thermodynamics / 10.9 Carnot Engine / 10.9.2

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The CORRECT sequence of the working principle of Carnot engine is

Adiabatic compression → isothermal expansion → isobaric compression → isochoric expansionIsothermal expansion → isobaric compression → adiabatic compression → isochoric expansionIsothermal expansion → adiabatic expansion → isothermal compression → adiabatic compressionIsobaric compression → isothermal expansion → isochoric expansion → adiabatic compression

Class 11 - Physics / Unit 10 - Thermodynamics / 10.9 Carnot Engine / 10.9.3

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All Carnot engines have zero efficiency if they are operating between two bodies with

the same temperature and the same nature of the working substancedifferent temperatures and the same nature of the working substancethe same temperature irrespective of the nature of the working substancedifferent temperatures irrespective of the nature of the working substance

Class 11 - Physics / Unit 9 - Physical Optics / 9.3 Michelson's Interferometer / 9.3.1

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Michelson's interferometer is PRIMARLY used to measure

velocity of lightamplitude of lightfrequency of lightwavelength of light

Class 11 - Physics / Unit 9 - Physical Optics / 9.2 Interference of Light / 9.2.5

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In Young's double slits experiment, the relation used to find the position of the dark fringes is (Note: All the symbols have their usual meaning.)

Y = (m + 1)\lambda L / d

Y = (m - 1)\lambda L / d

Y = (m + 1/2)\lambda L / d

Y = (m - 1/2)\lambda L / d

Class 11 - Physics / Unit 9 - Physical Optics / 9.1 Nature of Light / 9.1.3

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Q10

According to Huygen's principle, light travels in the form of
I. photons
II. corpuscles
III. wavefronts

I onlyIII onlyI and IIII and III

Class 11 - Physics / Unit 9 - Physical Optics / 9.2 Interference of Light / 9.2.2

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Q11

Colours seen from an oil film on water depends on the following factors EXCEPT

angle of viewdensity of the oilindex of refractionthickness of the film

Class 11 - Physics / Unit 9 - Physical Optics / 9.6 Polarisation / 9.6.4

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Q12

The optical media that is used to eliminate the glare of light produced by the road surface during driving is

sun screenconvex lensplane mirrorpolaroid glass

Class 11 - Physics / Unit 9 - Physical Optics / 9.6 Polarisation / 9.6.7

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Q13

Which of the following is NOT the application of polarisation of light?

Photographers use filters to reduce the glare in order to get clear picturesDrivers use sunglasses that diminish the brightness of headlights of a carAstronomers use lenses in telescopes to enlarge the image of celestial bodiesFishermen use eye-wear which decreases the reflection of light from the water

Class 11 - Physics / Unit 9 - Physical Optics / 9.6 Polarisation / 9.6.6

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Q14

If the analyser is rotated from $0°$ to $90°$ , then the transmitted intensity of polarised light will

decrease to zeroremain the samevary unpredictablyincrease to maximum

Class 11 - Physics / Unit 8 - Waves / 8.3 Superposition of Waves / 8.3.1

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Q15

The resultant displacement at any point due to the sum of displacements of two or more waves is called

interferenceDoppler's effectHuygen's principleprinciple of superposition