Question # 1

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

The necessary condition for nuclear fusion is.

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High temperature and high pressure.

Low temperature and high pressure

Low temperature and low pressure

High temperature and low pressure.

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

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

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Nucleus

Neutrons

Protons

Electrons

The maximum K.E. with which photoelectrons are emitted depends very strongly on the.

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Intensity of incident light

Electric field near the photocathode

Frequency of incident light

Polarization of incident light

One becquerel is equal to

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Decay of orie radioactive atoms per second

Decay of 10 radioactive atoms per secnd

Decay of 100 radioactive atoms per second

Decay of infinity radioactive atoms per second.

Bohr's atomic model assumes

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Nucleus is of infinite mass and is at rest

electron in a quantized orbit will not radiate energy

Mass of electron remains the same

All of the above

The exitance of more than one distinct state with the same energy is called.

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Exigency

Degeneracy

Normally

Emergency

Which of the following phenomenon is explained by the tunnel efffect.

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Alpha decay

Beta decay

Gama decay

Radioactivity

Which one of the following has maximum frequency.

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Visible light

Gama rays

Ultraviolet rays

Infrared rays

The constant lamda is called the.

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Decay constant

Gas constant

Planck's constant

Dose constant

Which type of amplifier causes minimum drain of power supply.

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Class -A

Class -B

Class-C

Class -AB

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

Lissajou's figures are used in a Cathode Ray Oscilloscope while measuring.

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Time period

Frequency

Voltage gain

phase angle

Which of the following atom pair have the same structure.

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N, C

B, Li

H2 , Ne

Li , Na

One particle having zero mass and zero charge is.

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Positron

Electron

Neutrino

Neutron

The radius of first Bohr's orbit for hydrogen atom is.

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0.53 m

0.53 nm

0.053 nm

0.53 mm

An important property of an ideal power supply is.

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Infinite internal resistance

Zero internal resistance

Large output resistance

Small output resistance

Which of the following wavelength lies in X-rays region.

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1 A

100 A

1,000 A

10,000 A

In scattering experiment which force scatters alpha particle.

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Nuclear force

Coulomb's force

Gravitational force

Centripetal force

The best shield against Gama rays would be of

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Heavy water

Aluminium

Iron

Lead

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