Question # 1

In 1905, the special theory of relativity was proposed by

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Einstein

Bohr

Maxwell

De Broglie

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

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Mass

Charge

Energy

Momentum

Energy of Black body radiation depends upon

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Nature of surface of body

Nature of material of body

Shape and size of body

Temperature of the body

Max planck received noble prize in:

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1927

1932

1918

1914

When platinum is heated is become dull red at:

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900°C

500°C

800°C

1100°C

The stopping potential for a certain metal is 10 volts. Thus work function for the cathode is.

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10 J

1.6 X 10^-18 J

1.6 X 10^-19 J

1.6 X 10³⁰ J

Photodiode is used for wave nature of.

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Light

Thermal radiation

Radi waves

Sound waves

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

The mass of an object will be doubled at speed.

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2.6 x 10⁸ m/s

1.6 x 10⁸m/s

2.6 x 10⁷m/s

3.6 x 10⁷ m/s

Who explained the photo electric effect.

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Max Plank

Einstein

Henry

Rutherford

Platinum wire becomes yellow at a temperature of.

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900^oC

1300^oC

1600^oC

500^oC

Platinum wire becomes white at a temperature of.

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1600^oC

1300^oC

1100^oC

900^oC

The existence of positron in 1928 was predicted by

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Anderson

Dirac

Chadwick

Plank

The concept of direction is purely

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Relative

Absolute

Relative to the motion

None of these

The Compton effect is associated with

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X-rays

y-rays

Positive rays

ß-rays

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

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Electron

Proton

β particle

All

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

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