Question # 1

According to Coulomb's law what happens to the attraction of two oppositely charged objects as their distance of separation increases.

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Increase

Decrease

Remain unchanged

Cannot be determined

Who wrote books on sound and music.

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Galileo

Alkundi

Alberuni

Ibn al Haithem

LASER is a device which can produce

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Monochromatic beam of light

Coherent beam of light

An intense beam of lgiht

All of these

The change in wavelength of an X-ray when scattered from an electron is called.

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Compton shift

Doppler shift

Stefan's law

Fraunhofer lines

Which one of the following is a neutron absorber

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Pb

Cd

Cu

Ag

A simple astronomical telescope consists of two

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Concave lenses

Convex mirrors

Convex lenses

Plano convex lenses

Two bullets a and b have masses 1 kg and 12 kg respectively.

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K.E. of B will be twice that of A

K.E. of A will be twice that of B

Both have same K.E.

K.E. of A will be half that of B

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

The real depth of a swimming pool is 2 m What is the apparent depth of the pool if the refractive index of water is 1.33

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1.0 m

1.5 cm

2.0 m

2.5 m

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

What is true is real images formed by a converging lens.

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they are inverted

They are on the same side of the lens as the object

They can never be shown on a screen

They cannot be seen

The ideal thermal efficiency of a cyclic heat engine is limited by

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Friction in the engine

Amount of heat in the engine

Difference between input temperature and output temperature.

Amount of work

In a parallel resonant circuit, at resonance

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Current is maximum

Voltage is maximum

Impedance is minimum

Impedance is zero

Select the one that is not a donar

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P

AS

Sb

In

The mass that appears in Newton's second law is known as.

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Rest mass

Gravitational mass

Inertial mass

Weight

The wave nature of light was proposed by

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Thomas Young

Fresnel

Maxwell

Huygen

A physical quantity which produces rotation in a body is called.

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Force

Torque

Momentum

accelerate

Force acting on a test charge between the plates of a parallel plate capacitor is F. If one of the plates is removed teh force on the same test charge will be.

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Zero

F/2

F

2 F

What do we study by crystallography.

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The analysis of X ray spectra of elements and study of crystal structure.

Visible spectra of sources and crystal study

Ultraviolet spectra of sources and crystal study

Characteristics of X-rays

In the gas equation PV =nRT , V is the volume of.

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1 g of gas

1 L of gas

1 mol of gas

1 kg of gas

In heavy elements of the periodic table the number of neutrons than protons are.

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Lesser

Greater

Equal

Undetermined

Abu abdullah ibn Jabir Al battani was the greatest

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Philospher

Mathematician

Astronomer

Palmist

If a body retains completely its altered shape and size, it is said to be

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Perfecto elasticity

Perfect plasticity

Elasticity

elastic limit

The extension produced in a sample of material depends upon

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Nature of the material

Stretching force

Cross range order

All of the above

Which type of radiation would be stopped completely by a thin piece of cardboard.

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Alpha particles

Beta particles

Gama rays

X -rays

In which reaction two or more small light nuclei nuclei come together or fuse to form a large nucleus.

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Radioactivity

Radioactivity dating

Nuclear fusion

Nuclear fission

Inductance divided by resistance and the product of capacitance and resistance both have units of.

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Charge

Time

Force

Current

The transition of inner shell electrons in heavy atoms gives rise to the emission of.

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Low energy b-particle

High energy b-particle

High energy X- rays

High energy gama rays

The international acceptable scientific notation of a number 123.4 is

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12.34 x 10¹

1.234 x 10²

1.234 x 10³

0.123 x 10³

One light year is equal to.

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9.46 x 10¹⁵ cm

9.46 x 10¹⁵ m

9.46 x 10¹⁵ km

7.88 x 10¹⁴ m

Power of the lens is one dioptre, if its focal length is.

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1/6 metre

1/2 metre

1 metre

8 metre

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