Question # 1

An operational amplifiers will act as an inverting amplifier when the input signal is connected to.

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Inverting terminal

Non inverting terminal

Earthened wire

Both a and b

Positron are produced during.

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Annihilation

ionization

Pair production

x rays production

Which of the following detectors can count fast and operate at low voltage.

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G.M Counter

Cloud chamber

Solid state detector

Bubble chamber

The critical mass of a fission reaction is.

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The mass to start a nuclear fission reaction

The minimum mass for chain reaction

The size of the reactor core

The size of fuel plus the size of moderator

According to Max. Planck, energy is released or absorbed in discrete packets called.

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quanta

Meson

Energy shells

Position

The part of theory of relativity which deals with accelerated bodies is called.

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special theory of relativity

General theory of relativity

Lorentz's theory of relativity

Galilean theory of relativity

The tunnel effect makes possible

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Alpha decay

Gama rays

Positive Beta decay

negative Beta dacay

The strength of photo electric current depends upon.

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Intensity of incident light

Frequency of incident light

Angle of incident light

Distance between anode and cathode

Which of the following are electromagnetic waves.

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Alpha particles

Beta particles

Gama rays

Water waves

In the experiment of photo electric effect the minimum frequency of photons at which electrons are emitted from a metal surface is called.

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Critical frequency

Typical frequency

Threshold frequency

Surface frequency

White light a tungsten filament lamp is passed through sodium vapor and viewed through a diffraction gritting Which of the following best describes the spectrum which would be seen.

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Coloured lines on a black background

Coloured lines on a white background

Dark lines on a coloured background

Dark lines on a white background

Which circuit elements has two stable states and can be used to store information.

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Flip flop or latch

Logic gate

Oscillator

Amplifier

The process by which nuclei emit a ,b and gama rays in order to attain stability is called.

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Radioactive disintegration

Radio activity

B decay

Radioactive transmulation

When we pass a radiation from a radioactive material through an electric field.

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All three kinds of rays will be deflected

Only the Gama rays are deflected

The Alpha and Beta particles are deflected

Only the alpha particles are deflected

The emission of Beta particle from protonium -218 results in the formation of.

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Protactinium -231

Thorium -232

Astatine -218

Radon -222

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

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Joule

Watt second

Newton metre

Electron volt

The emission of electrons from a metal surface when exposed to light of suitable frequency is called.

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Pair production

Compton effect

Photo electric effect

Zeeman effect

The mass of an alpha particle is.

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2 u

4 u

6 u

8 u

Which of the following is required for maintaining sustained chain reaction.

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Neutrons

Protons

Electrons

Photons

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

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

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