Question # 1

The output of two input OR gate is zero only when its.

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Either input is one

Either input is zero

Both inputs are zero

Both inputs are one

The cosine of the phase angle between the current and voltage in an A.C. circuit is called the

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Lead factor

Lag factor

Dissipation factor

Power factor

Thermodynamics concern its primary with the

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Measurement of quantity of heat

Physical effects of temperature changes

Conversion of heat into other energy forms

Behavior of gases

A relationship between mechanical work and heat energy was firstly established dby.

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Davy

Count Rumford

Joule

Kelvin

The loudness of a sound deepness on its

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Wavelength

Frequency

Wave amplitude

Regularity

What is the average K.E. of gas molecules at temperature equal to K.

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kt/3

3/2 KT

1/2 KT

2/3 KT

A leser beam may be used to measure very large distance because it is.

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Unidirectional

Cohernet

Monochromatic

Not absorbed

Which Isotopes is use din radioactive dating.

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C¹²

C¹³

C¹⁴

C¹⁶

Angular simple harmonic motion is.

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Periodic rectilinear motion

Independent of any applied torque

Periodic rotational motion

Never defined

Simple harmonic motion may be assumed as a projectio of uniform circular motion along a

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Diagonal

hypotenuse

Diameter

Radius

Which Muslim Scientist gave the first clear description and correct analysis of pinhole camera.

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Nasir al Din Al tusi

Ibn al Haithem

Ibn Ishaqal kundi

al -Khawarizmi

Which term best describes the nature of light from modern view point.

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Waves

Rays

Particles

Photons

A pencil dipped partially into water appears bent because of.

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Reflection of water surface

Diffraction of water surface

Refraction of water surface

Water is a fluid

On which temperature scale a degree is 1/180 of the interval between the freezing point and the boiling point.

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Celsius scale

Fahrenheit scales

Rankine scale

Kelvin scale

Which experiment is a demonstration that matter and energy can display properties of both waves and particles.

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young's double slit experiment

Division germier experiment

Heisenberg's uncertainty experiment

Stern Gerlach experiment

When a posirtron is emitted it causes.

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Mass number to increase by one

mass number to decrease by one

Atomic number to decrease by one

Atomic number to increase by one

For which of the following objects is the centre of mass equidistant from every point on its surface

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An unsharpened pencil

A gramophone record

An egg

A table tennis ball

Which of the following is a unit of electric field strength.

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c m-1

v m-2

N C-1

N V-1

In any L-C-R circuit

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Current lags the applied voltage

Current leads the applied voltage

Current sometimes leads and sometimes lags the applied voltage

Current remains in phase with voltage

If D1 and D2 are the powers of two lenses placed in contact then the power of the combination will be.

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D1+D2

D1-D2

D1/D2

D1 x D2

Gauss's law a most useful in cases where the charge distributions.

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Are made up of discrete point charges

Are finite in their spatial extent

Give rise to inverse square law fields

Posses a certain amount of symmetry

when a body accelerates.

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Its direction always changes

Its mass always changes

Its velocity always changes

It falls towards the earth

The phase different between the particles vibrating's between two consecutive nodes is.

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0

Lamda /2

2

2 lamda

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

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zero

Maximum

Minimum

Infinite

The central ring is bright in case of Newton's rigs produced by

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Reflection

Wedges

Refraction

Transmission

Which given quantity remains the same in isotones.

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Mass number

Atomic number

Number of neutrons

Number of protons

One particle having zero mass and zero charge is.

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Positron

Electron

Neutrino

Neutron

Which of the following physical quantity has different units as compared to others.

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Weight of a body

Tension of a string

Buoyant force

Electromotive force

if the line of action of force passes through the axis of rotation of origin, then torque is.

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Maximum

Negative

Zero

1

Light entering glass will not suffer change in

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Frequency

wavelength

Speed

Direction

The phenomenon in which a photon of frequency 'f' is scattered by an electron and the scattered photon has frequency f <f is known as.

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Pair production

Pair annihilations

Photoelectric effect

Compton's effect

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