Question # 1

The dimensions of Plank's constant is same as that of.

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Energy

Power

Acceleration

Angular momentum

The value of Stefan is constant is:

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4.57 x 10^-8 m²k²

5.67 x10^-8 wm^-2k^-4

6.67x 10^-11 wm²k⁴

7.45 x 10^-9 m² wk³

The special theory of relativity based on.

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One postulate

Two postulates

Three postulates

Four postulates

The minimum frequency needed to emit an electron form metal surface is called:

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Work function

Threshold frequency

Quanta frequency

All of above

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 numerical value of Compton wavelength is equal to

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3.43 x 10^-12 m

1.43 x 10^-12m

2.43 x 10^-12m

0.43 x 10^-12m

Application of wave like nature of particle is

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Photodiode

Optical microscope

Electron microscope

Compound microscope

Who explained the photo electric effect.

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Max Plank

Einstein

Henry

Rutherford

When platinum is it becomes orange at.

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500^oC

900^oC

1100^oC

1300^oC

Pair production can take place only when energy of radiation is equal and greater than 1.02 MeV, thus correct option is.

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X rays

Gama rays

Heat Radiation

Ultraviolet rays

If the energy of photon is 10 eV and work function is 5 eV, then the a value of stopping potential will be

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50 V

2 V

5 V

15 V

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Physics FSC Part 2 Chapter 19 Online MCQ's Test MCQs With Answers

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