Question # 1

Which of the following is dimensionless.

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Strain

Stress

Pressure

Volume

Entropy of universe is increasing day by da due to.

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Power generating processes

Energy used into work

Depletion of ozone

All of the above

The spin angular momentum and orbital angular momentum are usually differentiated in terms of.

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Radius of bodies

Mass of bodies

Torques of bodies

Momentum of bodes

Shadow formation and the pin hole camera illustrate the

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Phenomenon of reflection

Phenomenon of refraction

Phenomenon of total internal reflection

Rectilinear propagation of light

Which quantity decay exponentially when a capacitors is discharged.

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Charge only

Charge and voltage only

Charge and current only

Charge voltage and current

How positives feedback will effect an amplifier.

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Increases the voltage gain

Decreases the voltage gain

Imitates oscillation to occur

Damaged it

Which Muslim Scientist is regarded as father of optics.

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Ibn al Haithem

Al khawarizmi

Nasir al Din Al tusi

Ibn Musa al khawarzmi

The direction of induced e.m.f in a circuit is in accordance with conservation of.

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Mass

Charge

Momentum

Energy

A pendulum vibrates with a time period of 1 s which range of sound is produced by it

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Audible

Infrasonic

Ultrasonci

Super sonic

Which one of the following scientists got Noble prize due to his work of combining two basic forces of nature.

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Dr. Abdul Qadeer khan

Dr. Abdul Salam

Dr. Muhammad ishfaq

Dr. Mubarak mund

Which was the transparent front part of the eye that covers the pupil, iris and interior chamber.

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Cornea

Fovea

Sclera

Choroid

Inertial mass and gravitational mass are

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Opposite

Proportional

Weights

Inversely proportional

The molecular weight of D2O is

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16

18

20

24

Which effect explain the frequency shift that occurs when there is motion sound a listener or both relative to the medium.

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Early effect

Doppler's effect

Hall effect

Zeeman effect

Which of the following gases has the maximum rms speed at STP.

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O2

H2

N2

CO2

Tesla is the unit for measuirng

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Magnetic intensity

Magnetic induction

Magnetic moment

Electric potential

Which of the following properties of sound is affected by change in air temperature.

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Amplitude

Intensity

Frequency

Wavelength

A perfect gas is one whose

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Molecules are masless

Molecules are energetic

Molecules are perfectly elastic

Molecules are at rest

Para magnetism is.

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A distrotion effect

An orientation effect

A skin effect

A resistance

A bus and a car moving with the same K.E. are acted upon by the same retarding force then the

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car will stop first

Bus will stop first

Both will stop simultaneously

Both will never stop

If the wave length of a wire is 1 cm and its period is 0.02 s, the velocity of the wave will be

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20 cm s-1

50 cm s-1

60 cm s-1

100 cm s-1

Which of the following is electromagnetic wave.

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X rays

Micro waves

Light

All of these

Who discovered a relation between electric and magnetic field.

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Hans Christian Oersted

Michelson Faraday

Lenz

Hertz

The unit of electrochemical potential is.

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J mol-1

volt

J C-1

Mol J-1

The process of energy generation in sun and stars is.

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Fusion of heavy nuclei

fusion of light nuclei

Fission of light nuclei

Solar panels

Which of the following quantities is discrete according to Bohr's hypothesis.

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Momentum

Potential energy

Angular velocity

Angular momentum

A resistor whose resistance decreases with increasing intensity is.

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Light dependent resistor

Thermistor

Thermocouple

Strain gauge

if temperature eon Celsius scale is 50 oC the temperature on Fahrenheit scale will be.

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102 ^oF

108 ^oF

112 ^oF

122 ^oF

A heat engine with 100% efficiency would have to

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Do no work

Be at a uniform temperature

Use no heat

Discharge at 0^oC

Which current can pass through a capacitor continuously.

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Alternating current

Direct current

Eddy current

Pulsating current

When of the following radiations are not emitted by electron transitions in atoms.

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Visible rays

Ultraviolet rays

Infrared radiations

Alpha particles

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