Question # 1

The unit of Rh is.

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ms-1

m

m²

m^-1

The typical nuclei are less than:

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10^-16m

10^-14m

10^-12m

10^-10m

Study of hydrogen visible spectrum in

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1886

1887

1895

1885

1 rem =

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0.001 SV

0.01 SV

0.1 SV

1.01 SV

The rest mass x ray photon is

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Infinite

Zero

1.67 X^-17 kg

All of the above

If 13.6 eV energy is required to ionize the hydrogen atom, then the required energy to remove an electron from n=2 is:

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10.2 eV

0 eV

3.4 eV

6.8 eV

The energy of 4th Orbit in hydrogen atom is.

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-2.51 eV

-3.50 eV

-13.60 eV

-0.85 eV

Earth orbital speed is

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10 km/s

20 km/s

30 km/s

40 km/s

The temperature of core of nuclear reactor is:

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1100°C

1200°C

1300°C

1400°C

We can find from de Broglie formula

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Wavelength

Amplitude

Speed of wave

Frequency of wave

Life time of metastable states is

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10^-6 sec or more

10^-3 sec or more

10^-5 sec or more

None of these

The first orbit in the hydrogen atom has a radius.

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0.53 nm

0.053 nm

0.0053 nm

0.00053 nm

Balmer Empirical formula explains the electromagnetic radiation of any excited atom in terms of their.

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Energy

Mass

Wave length

Momentum

For Holography we use

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X ray

Laser

gama rays

Beta rays

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Physics ICS Part 2 Chapter 20 Online MCQ's Test MCQs With Answers

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