Question # 1

Which of the following atom pair have the same structure.

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N, C

B, Li

H2 , Ne

Li , Na

At what speed the mass of a body will be doubled.

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0.67 C

0.77 C

0.87 C

0.97 C

the alpha particle does not travel for enough in air.

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Due to its intense ionization

Due to its large mass

Due to its high charge

Due to its Hight Ionization

Which of the following can be used as an arrester in a nuclear reactor.

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Graphite

heavy water

Uranium

Cadmium

Alpha particles are

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Helium nuclei

sodium nuclei

Ioized nuclei

Hydrogen nuclei

The most convenient unit for energy at the atomic level is.

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Joule

Watt second

Newton metre

Electron volt

Push pull amplifiers employ

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One transistor

Two transistors

Three transistors

Four transistors

Which of the following particles leave no trail in a cloud chamber.

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Electrons

Protons

Alpha particles

Neutrons

A complete amplifier circuit made on a silicon chip and enclosed in a small capsule is

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Inductor

Metal detector

Diode

Operational amplifier

In the experiment of production of X rays electrons are accelerated towards the anode by

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Thermionic emission

Potential difference

Breaking potential

Cut of current

In order to reduce uncertainty in momentum one must use light of.

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Short wavelength

Large wavelength

Wavelength of intermediate value

Wavelength of any value

Which one of the following spectra series is in the ultraviolet region.

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Lyman series

Paschen series

Brackett series

Plund series

The process of pair production will take place if the energy of photon is greater than

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0.21 MeV

0.51 MeV

1.51 MeV

1.21 MeV

When of the following radiations are not emitted by electron transitions in atoms.

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Visible rays

Ultraviolet rays

Infrared radiations

Alpha particles

An operational amplifier have how many input terminals.

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One

Two

Three

Four

Mosley's law establishes the x rays fluorescence's of target element with its.

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Atomic weight

Atomic number

Density

Lattice constant

One gray is equal to.

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1 J-1 kg -1

1 J -1 kg -2

1 J 1 -g-1

1 j kg -2

Which one of the following has the largest wavelength.

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x rays

Infrared rays

Visible light

Radio waves

In which reaction two or more small light nuclei nuclei come together or fuse to form a large nucleus.

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Radioactivity

Radioactivity dating

Nuclear fusion

Nuclear fission

Which given quantity remains the same in isotones.

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Mass number

Atomic number

Number of neutrons

Number of protons

The Rutherford atom according to classical theory is

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Stable

Unstable

Partially stable

Quantized

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