Question # 1

What is the overall gain, if three amplifiers each with a gain of 30 are cacaded.

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30

90

270

27,000

Which Isotopes is use din radioactive dating.

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C¹²

C¹³

C¹⁴

C¹⁶

Which of the following is believed to be carrier o nuclear forces.

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Lepton

Meson

Bason

Baryon

The possible values of principal quantum number are.

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only zero

0,1,2,...................7

1,2,3........................8

2,3,4,6...............10

Alpha particles are

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Helium nuclei

sodium nuclei

Ioized nuclei

Hydrogen nuclei

The half life of uranium -238 is

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1620 years

4.5 x 10⁹years

3-8 days

23.5 minutes

In a fission reactor which particle causes a uranium -235 nucleus to split.

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Alpha particle

Gama ray

Neutron

Proton

Emitter follower amplifier is an example of.

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Current series feedback

Voltage series feedback

Current shunt feed back

Voltage shunt feedback

Which given quantity remains the same in isotones.

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Mass number

Atomic number

Number of neutrons

Number of protons

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

Which experiment confirmed the de Broglie hypothesis.

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Double slit experiment

Division germier experiment

Schrodinger's Cat experment

Bohr's experiment

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

The electrons behave as wave because.

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They can be diffracted by a crystal

They can be defecting by magnetic field

They can be deflecting by electric field

they can produce ions in gases

The phenomenon is which the wavelength of scattered X-rays is larger than the incident X-rays is known as.

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Zeeman's effect

Photoelectric effect

Compton's effect

Annihilation of matter

Which of the following is deflected by an electric field.

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Alpha particles

X rays

Gama rays

Neutrons

Special theory of relativity deals with the events in the frames of reference which move with constant.

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Time interval

Acceleration

Momentum

space interval

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

What is the basic advantage of class A operation of an amplifier.

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It has high efficiency

It has high gain

It has low distortion

It has high distortion

In Compton's effect it was considered that X-rays consist of

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Electrons

Holes

Neutrons

Protons

X-rays spectrum may be

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Continuous spectrum

Discontinuous spectrum

Line spectrum

Continuous and line spectrum

The loss of mass in a.m.u in a nuclear change can be calculated from energy involved in MeV by

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Dividing by 931

Multiplying by 931

Diving by 391

Multiplying by 391

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