Question # 1

By modern system of NAVSTAR, the speed any where on the earth can be determined to accuracy about.

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20 ms-1

10 ms-1

2 cms-1

2 ms-1

We can never accurately describes all aspects of sbatomic particles simulatanously. It is correct according to:

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Uncertainity Priciple

De-broglie Theory

Einstin Theory

Photo electric effect

The unit for Plank's constant is:

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Js^-1

Jm

Js

Jm²

The existence of positron was discovered in:

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1929

1928

1931

1933

Maximum Compton shift is observed at.

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30^oC

90^oC

45^oC

180^oC

The emission of electrons from metal surface when exposed to light is called:

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Compton effect

Pair production

Photoelectric effect

None of above

When a very high energy modeules such as y radiation interact with matter, the phenomenon arising will be.

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Photoelectric effect

Compton effect

Pair production

Annihilation of matter

In an nihilation emitted photons moves in opposite directions to conserve.

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Mass

Charge

Energy

Momentum

Einstein photoelectric equation is

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None of these

When platinum is heated is become dull red at:

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900°C

500°C

800°C

1100°C

The concept of direction is purely

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Relative

Absolute

Relative to the motion

None of these

The value of Wien's constant:

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2.9x10^-3mk

2.19x10^-7mk

3.18 x10⁶ km^-1

6.21 x 10^-9m²wk³

The position has charge which is in magnitude equal to the charge on

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Electron

Proton

β particle

All

Number of electros emitted in photo electric effect depend upon.

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Intensity of incident light

Frequency of incident light

Energy of incident light

Wavelength of incident of light

Wave nature of particle was given by:

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Clemensen

Louis de Broglie

Laster H. Germer

Clinton S. Davisson

Einstein was awarded Nobel prize in physics in

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1905

1911

1918

1921

Platinum wire becomes yellow at a temperature of.

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900^oC

1300^oC

1600^oC

500^oC

Using relativistic effects the location of an air craft after an hour fight can be predicated about

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20 m

50 m

760 m

780 m

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