Question # 1

Who studied the change in velocity with the help of geometry for the first time.

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Nicole Oresme

Galileo

Alberuni

Ibn al haithem

The specific heat of an ideal gas values as

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To

T1

T2

T3

Optics is the

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Scientific study of light and vision

Scientific study to sound

Scientific study of time

Scientific study of fluid

What should be the shape of an ideal thermometer.

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Sphereical

Cubical

Cylindrical

Rectangular

How many calories of heat are required to evaporate completely 1 g or ice at 0^oC

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120 calories

520 calories

720 calories

920 calories

The distance between the optical centre and principal focus is

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Focal plane

Focal length

Optical centre

Principal axis

The temperature which is the same in ^oC and ^oF is.

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-20

-40

20

40

Echoes arise from

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Reflection

Refraction

Diffraction

Dispersion of sound waves

Human's eye acts like a

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LASER

Mirror

Lens

Fibre optics

The cross product of two vectors is magnitude when

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Vectors are parallel

Vectors are antiparallel

Vectors are perpendicular

They are rotated through 270^o

When white light is incident on a diffraction grating, the light that will eb deviated from central image will be.

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White

Yellow

Red

Blue

A pair of point charges with equal magnitude and opposite sign separated by a distance 'r' produce.

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Electric dipole

Electric charge

Electric field

electric arc

The SI unit of angular velocity is.

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cm s-1

rad s-2

cm s-2

rad s-1

What is the power factor of LR circuit.

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Unity

Zero

infinity

Between 0 and 1

If a di electric is placed between the plates of a capacitor, its capacitance.

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Decreases

Increases

Remains unaffected

Is zero

In ideal gas equation PV = nRT , R is

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Universal gas constant

Avogadro's number

Plank's constant

Gravitational constant

What is a thermal properly of a material that determines the quantity of energy required to change the phase of a unit mass of that substance.

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Specific heat

Latent heat

Internal energy

Specific energy

Which of the following is the science of measuring the heat of chemical reactions or physical changes.

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Thermometry

Calorimetry

Telemetry

Photometry

The highest value reached by the voltage or current in one cycle is its.

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Top value

Maximum value

Average value

Peak value

In which form energy is stored in acondenser.

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Electric energy

Potential energy

Kinetic energy

Magnetic energy

A pure capacitor is connected in an AC circuit The power factor of the circuit will be.

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Unity

Infinity

0.5

Zero

Condenser is used

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To produce charge

To change the direction of current

To collect the charge

As a good conductor of electricity

A heat engine with 100% efficiency would have to.

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Do no work

Be at uniform temperature

Use no heat

Discharge of 0 ^oC

Plossi or symmetrical eye piece consists of

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Two plano convex lenses with same focal length

Two sets of doublets

An achromatic double

A spherical doublet

Which of the following represents an elastic wave.

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Light waves

Radiowaves

X-rays

Sound waves

Negative feedback

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Increases stability

Decreases stability

Produces oscillatory

Cannot occur

The amplitude of a vibrating body at resonance place in vacuum is.

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zero

Maximum

Minimum

Infinite

The heat accepted and rejected by a Carnot engine operating between two heat reservoirs defines.

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The efficiency of the working substance of the engine

the ideal gas scale of temperature

The ratio of the absolute temperature of the reservoirs

The thermal capacity of the working substance

A logic circuit whose output signal is '1' when inputs are different is.

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NAND gate

NOR gate

Exclusive OR gate

Exclusive NOR gate

When Photon incident on a metal produce the emission of electrons the process is called.

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Photo electric effect

Pair production

x-rays production

Gama ray production

Which are the two basic properties of a vector.

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Curvature and direction

Magnitude and direction

Magnitude and sign

Curvature and sign

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