Question # 1

The most readily fissionable isotope of uranium has atomic mass of

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234

235

236

238

An AND gate is.

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Equivalent to a series switching circuit.

Equivalent to a parallel switching circuit

Equivalent ot universal gate

A reciprocal of NAND gate

Half life and mean lifetime of a radioactive element are.

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Equal to each other

Inversely proportional to each other

Directly proportional to each other

Not related to each other

During the alpha decay process

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A neutron is emitted

a electron is emitted

A helium core is emitted

A proton core is emitted

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 binding energy per nucleon for uranium is about.

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7.7 MeV

9.6 MeV

13.6 MeV

21.6 MeV

An increase in frequency above threshold frequency results in.

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Increase in photo electric current

Increase in K.E. of electrons

Decrease in photoelectric current

Decreases in K.E. of electrons

The emission of photons by a metal when electrons are incident is called.

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Photo electric effect

Pair production

X-rays production

Gama ray production

What is the effect of electric and magnetic fields on X-rays

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X-rays are deflected

X-rays are not deflected

X-rays are sometimes deflected and sometimes not

Nothing can be said

A logic circuit with one input and one output that inverts the input signal at the output is.

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AND gate

NOT gate

OR gate

NOR gate

What is the scale for measurement of Banbridge mass spectrograph.

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Linear

Inverse

Exponential

Logarithmic

Which of the following is deflected by an electric field.

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Alpha particles

X rays

Gama rays

Neutrons

The X-rays coming from a X-rays tube

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Is monochromatic

Has all wavelengths smaller than a certain maximum wavelength

Has all wavelengths greater than a certain maximum wavelength

has all wavelengths minimum than a certain maximum wavelength

Why transistor is preferred to triode valve for use as an amplifier.

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Because it can handle large power

Because it has higher input impedance

Because it has higher voltage gain

Because it has lower voltage gain

The binding energy to pull the deuterium H apart into a proton and a neutron is equal to.

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1.22 MeV

2.22 MeV

3.22 Mev

4.22 MeV

In which of the following studies x-rays are not helpful.

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Crystal structure

Crystal surface

Crystal symmetry

Crystal atoms

Which of the following phenomenon is observed in obtaining an X ray photograph of our hand.

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Photoelectric effect

Zeeman effect

Shadow photography

Ionization

X-rays are good for imagining

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Tendons

Brain

Bones

Heart

The Rutherford atom according to classical theory is

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Stable

Unstable

Partially stable

Quantized

LASER is a device which can produce.

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Monochromatic beam of light

Coherent beam of light

An intense beam of light

All of the above

When a helium atom loses an electron it becomes.

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An a particle

A proton

A positive helium ion

A negative helium ion

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