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Physics > Numerical Values > Flashcards

Numerical Values Flashcards

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1
Q

Accuracy in measurement of speed without using relativistic effects is?

A

20 cm per second

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2
Q

Accuracy in measurement of speed using NAVSTAR is?

A

2 cm per second

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3
Q

Location of a plane after an hour flight, without taking relativistic effects into account can be measured up to how much accuracy?

A

760m

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4
Q

Location of a plane after an hour flight using NAVSTAR can be measured upto how much accuracy?

A

50 m

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5
Q

Equation for quantized radii is?

A

0.053nm (n^2)

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6
Q

Equation for quantized energy is given as?

A

-13.6eV
_________
n^2

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7
Q

Radius of nucleus is?

A

10^-14 m

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8
Q

Radius of atom is?

A

5×10^-11 m

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9
Q

Atom resides is excited state for how much time?

A

10^-8 s

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10
Q

Atom resides in metastable state for how much time?

A

10^-3 s

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11
Q

Half life of uranium 238 is?

A

4.5 billion years

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12
Q

Half life of radium 226 is?

A

1620 years

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13
Q

Half life of radon gas is?

A

3.8 days

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14
Q

Half life of uranium 239 is?

A

23.5 minutes

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15
Q

Product of half life and decay constant of an element is equal to?

A

0.693

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16
Q

Potential difference applied in Wilson cloud chamber to clear all ions is?

A

1000 V

17
Q

Pressure used in Geiger muller counter is?

A

0.1 atm

18
Q

Potential difference between electrodes of Geiger muller counter is?

A

400 V

19
Q

Entire pulse in a Geiger muller counter takes how much time?

A

1 micro second

20
Q

Dead time of Geiger muller counter is?

A

1 ms

21
Q

Minimum energy needed for production of pulse in solid state detector is?

A

3 to 4 eV

22
Q

Mass number of uranium is?

A

238, 239

23
Q

Mass number of radon is?

A

222

24
Q

Mass number of radium is?

A

226

25
Q

Fission reaction is performed with which isotope of uranium?

A

Uranium-235

26
Q

Atomic number of uranium is?

A

92

27
Q

Atomic number of plutonium is?

A

94

28
Q

Energy released when two atoms of deuterium form Helium?

A

24 MeV

29
Q

How much energy is released when deuterium and tritium fuse to from helium and a neutron?

A

17.6 MeV

30
Q

Voltage and glancing angle in davison and germer experiment is?

A

54 V and 65 degree

31
Q

Voltage needed to run a ringing bell or radio transmitter is?

A

9 Volt

Physics (8 decks)

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