Question # 1

An Alpha particle is the same as

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A helium nucleus

A high speed electron

A hydrogen nucleus

Electromagnetic radiation of short wavelength

The energy in electron volts necessary to remove the most loosely bound electron from the neutral atom is known as.

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Faraday energy

Wave number

Ionization Potential

Excitation potential

The band width of an audio amplifier is.

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10 Hz to 10 kHz

20 Hz to 54 Hz

20 Hz to 20 kHz

20 Hz to 60 kHz

Work function is generally expressed in.

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Electron volt

Joules

Newtons

Gauss

Which of the following is its own anti particle.

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Photon

Electron

Proton

positron

Which of the following is invariant under Galilean transformation.

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Velocity

Impulse

Momentum

Distance

An operational amplifier have how many input terminals.

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One

Two

Three

Four

Why FET amplifiers are called voltage controlled devices.

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Input is a current signal

Output is a current signal

Input is a voltage signal

Output is a voltage signal

The mass of an helium nucleus is equal to.

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2.0015 u

3.0015 u

4.0015 u

5.0015 u

If the base emitter junction is forward biased and base collector junction is reverse biased the BJT is in.

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cut of mode

Amplification mode

Saturation mode

Inversion mode

Neutrino9 is a particle with

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Charge less property and has no spin

Charge less property and has spin

Charge less like electron and has spin

The same property as neutron

Which type of amplifier causes minimum drain of power supply.

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Class -A

Class -B

Class-C

Class -AB

The ionization energy for hydrogen atom is

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-11.6 eV

-12.6 eV

-13.6 eV

-19.6 eV

The Inner electrons in heavy atoms can be disturbed and dislodged by.

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X rays

Alpha particle

Beta particles

gama particles

Ionization of a hydrogen atom originally in its ground state takes a minimum out of energy equal to.

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2.4 J

4.2 J

12.3 eV

13.6 eV

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

What will be excitation energy in the third orbit of hydrogen atom.

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0.66 eV

0.85 eV

1.5 eV

5.4 eV

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

LASER beam my be measure very large distance because it is.

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Inidirectional

coherent

Monochromatic

Not absorbed

The neutral atoms of all isotopes of the same element contain the same numbers of.

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Electrons and protons

Electrons and neutrons

Neutrons

Neutrons and protons

The nucleus of tritium is called.

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Proton

Triton

Deuleron

Positron

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