Question # 1

One joule of energy absorbed per kilogram of a body is

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Roentgen

Grey

Rem

Curie

The number of protons in any atom are always equal to the number of

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Neutrons

Electrons

Positrons

Mesoris

When nitrogen is bombarded by alpha particles nitrogen nucleus changes into

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Oxygen

Carbon

Barium

Helium

The reciprocal of decay construct lamda of a radioactive element is.

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Half life

Mean life

Curie

total life

What is difference is isotopes

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Number of protons

Number of neutrons

Number of electrons

Charge number

Those elements whose charge number z is greater then __________ are unstable:

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80

79

82

83

Unit of decay constantλ is:

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ms

m^-1

m

S^-1

The number of neutrons in Li are

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2

3

4

7

Absorbed Dose 'D' is defined as

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m/E

E/C

C/m

E/m

Alpha particle carries a charge.

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-e

+2e

-2e

No charge

The potential difference between the top and bottom of a cloud chamber is of the order of

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290 v

400 v

1 kv

None of above

X -rays are similar in nature to.

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Gama rays

Beta rays

Alpha rays

Cathode rays

The dead time of G.M tube is.

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10^-1 sec

10^-6sec

10^-4sec

10^-8sec

Which pair belongs to hadrons.

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Protons and Neutrons

Neutrons and electrons

Photons and electrons

positrons and electrons

Both xenon and caesium each have:

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41 isotopes

36 isotopes

43 isotopes

33 isotopes

Two up quarks and one down quarks makes a

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Proton

Newton

Photon

Meson

The charge number of Ba is.

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197

141

56

85

The most abundant isotope of neon is:

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Neon 21

Neon 20

Neon 22

None of above

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Physics FSC Part 2 Chapter 21 Online MCQ's Test MCQs With Answers

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