Question # 1

The number of electrons in U nucleus are.

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92

235

zero

143

Any transparent medium bounded by one or two spherical surfaces is called

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Prism

Lens

Plane mirror

Grating

Blue colour of sky is due to.

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Diffraction

Reflection

Polarization

Scattering

X-rays travels ins straight line with velocity

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Less than light

Greater than light

Equal to light

Equal to sound

A polaroid is

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A red light filter

A device used for a analyzing polarized light

A device used in polarimeter

An adjustable shutter

For capacitors connected is series.

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The difference of potential is same for an

The charge on each is the same

The resultant capacitance is greater than

The charge on each is not the same

The energy transmitted per second though unit are held perpendicular to the direction of propagation of the wave is called.

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Intensity of sound

Pitch of sound

Loudness of sound

Quality of sound

When an unbalanced external force acts on a body for a short interval of time.

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The body will experience an impulse.

The momentum of the body increases

The velocity of the body increase

The body is not effected

Two convex lens focal length 'f' use din combination become telescope. When the distance between them is.

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1

4f

2f

f/2

Which of the following quantity has a unit that can be expressed in terms of just two different SI base units.

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Area

Change

Electric current

Length

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

Which of the following causes the deflection of Alpha particles when they re passed through a thin foil.

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Attraction of nucleus

Collision with nuclei

Interactions with electrons

Electrostatic repulsion by the nucleus

Thermodynamics deals with

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Isolated systems

The interactions among various parts of the system

The microscopic behavior of a system

The interactions between system and surrounding

X-rays eject electrons from matter by

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Pair production

Pair annihilation

Compton effect

Photoelectric effect

Which electrical quantity has the same units as electromotive force.

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Charge

Current

Potential difference

Power

Which one of the following is an example of a reversible process.

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Work done against friction

Heat produced by current

Melting of ice

See back effect

In microwave ovens, heating is produced by the phenomena of

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Reflection

Refraction

Damped oscillations

Resonance

Alpha particles emitted from a radioactive material are.

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He nucliei

H -nucliei

Li nucliei

B nucliei

A 100 Hz A.C. is following in A 7 mH inductance What is its reactane.

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0.4 Ohms

4.4 Ohms

7Ohms

44 Ohms

The light rays which combine destructively would mean that resultant

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Intensity increases

Intensity decreases

Amplitude increases

Amplitude decreases

What would be the colour of sky through hour the day .If the earth has no atmosphere.

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Blue

Red

White

Black

In water drops rainbows are formed by

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Reflection

Refraction

Dispersion

All of these

The resultant magnitude of two vectors

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Is always positive

Can never be zero

Can be negative positive or zero

Is usually zero

If a rope in a hand makes 10 oscillations after every 2 s. the frequency of the wave is.

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2 C s-1

5 C s-1

10 C s-1

20 C s-1

Which of the following radiations can penetrate 20 cm thick steel.

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Alpha particles

Beta particles

Gama particles

Neutrons

Below which temperature gas can be liquified by increasing its pressure.

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Natural temperature

Boyle temperature

Critical temperature

Absolute zero

The SI unit of heat capacity is.

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kg J

Kg J-1

J K-1

Kg J-1 K-1

The action and reaction forces

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Must act upon the same body

Must act upon different bodies

Must be equal in magnitude but need not have the same line of action.

Different speed at the different height during ascent and during descent.

The Inner electrons in heavy atoms can be disturbed and dislodged by.

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X rays

Alpha particle

Beta particles

gama particles

Michelson's interferometer can be used to measure.

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Wavelength of light

Intensity of light

Amplitude of disturbances

Frequency of light

Mosley's law establishes the X-rays fluorescence of target element with is.

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Atomic weight

Atomic number

Density

Lattice constant

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