Question # 1

The constant lamda is called the.

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Decay constant

Gas constant

Planck's constant

Dose constant

At high temperature a body generally emits redactions of.

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Small wavelengths

Long wavelengths

Moderates wavelengths

Zero wavelengths

The half life of a radioactive substance depend on.

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Pressure

Temperature

Amount of substance

No external influences

A solid state detector is basically

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A reverse biased p-n junction

A forward biased p-n junction

A p-n -p transistor

A n-p-n transistor

In a nuclear reactor chani reaction is controlled by introducing.

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Iron rods

Cadmium rods

Graphite rods

Platinum rods

When Photon incident on a metal produce the emission of electrons the process is called.

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Photo electric effect

Pair production

x-rays production

Gama ray production

Emitter follower amplifier is an example of.

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Current series feedback

Voltage series feedback

Current shunt feed back

Voltage shunt feedback

the gain of an amplifier is independent of

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The two externally connected resistances

What is happening inside the amplifier

Internal structure of the amplifier

All of the above

Isotopes are the atoms of the same elements which contain equal number of.

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Nucleus

Neutrons

Protons

Electrons

The radius of second orbit of hydrogen atom is

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0.071 A

0.142 A

4.752 A

9.5298 A

The half life of a radioactive element depends upon.

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Temperature

pressure

nature of element

quantity of the element

Which uranium isotope having the atomic weights as given below is easily fissionable.

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234

235

236

238

The decimal equivalent of 1111 is

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5

10

15

120

The mass defect of Bohr's atomic model is

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Exclusion of nuclear motion

missing of classical and quantum theories

Failed to explain the fine structure of spectral line

All of the above

Among different elements of the periodic table which of the following atoms is the simplest.

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Carbon

Oxygen

Hydrogen

Nitrogen

The process of energy generation in sun and stars is.

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Fusion of heavy nuclei

fusion of light nuclei

Fission of light nuclei

Solar panels

A transistor consists of.

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One p-n junction

Two p-n junctions

Three p-n junctions

Four p-n junction

The energy in an electromagnetic wave is carried in the units called.

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Protons

Electrons

Neutrons

Nucleus

Alpha particles are used for the treatment of skin of a patient due to.

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Highly ionizing power

Low penetration power

Positively charged particles

Helium nucler

Which is the famous standard model of the universe.

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the big bang

Casmos

Astronaut

The small stap

The back ground radiation in the atmosphere on the average is

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0.5 Sv per year

1.0 Sv per year

1.5 Sv per year

2.0 Sv per year

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