Question # 1

The force that bonds protons and neutrons together int he nucleus despite the electrical repulsion of the protons is called.

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Molecular force

Nuclear force

Atomic force

Gravitational force

Two electrons approach each other their relative velocity will be.

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Zero

c

c/2

Infinity

The half life of a radioactive substance depend on.

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Pressure

Temperature

Amount of substance

No external influences

X-rays are also used for

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Ultrasound imaging

endoscopy

Computerized tomography scanning

Magnetic resonance imaging scanning

Nuclear force as compared to electrostatic force is.

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Weaker and long range

Weaker and short range

Stronger and longer range

Stronger and short range

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

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

Radio carbon in the atmosphere is produced by the bombardment of.

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Oxygen by high energy neutrons

Oxygen by high energy protons

Nitrogen by high energy protons

Nitrogen by high energy neutrons

X-rays travel with

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The speed of light

The speed of sound

The speed of 3,000 m s-1

The speed of 3,500 m s-1

Mosley's law establishes the x rays fluorescence's of target element with its.

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Atomic weight

Atomic number

Density

Lattice constant

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 is invariant under Galilean transformation.

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Velocity

Impulse

Momentum

Distance

Atomic reactor is based on

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Controlled chain reaction

Uncontrolledly chain reaction

Nuclear fission

Nuclear fusion

x-rays cannot produce

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Photoelectron

Compton electron

Electron positron pair

All of these

Which of the following is the most commonly used regions of operations for a transistor.

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Cut off

Saturation

Active

All of these

Push pull amplifiers employ

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One transistor

Two transistors

Three transistors

Four transistors

In a Geiger Marsden experiment why do the great majority of the Alpha particles pass straight through the metal foil.

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Atomic nuclei may contain neutrons

Atoms are electrically neutral

Atoms are largely empty space

Atoms have positively charged nuclei

In de Brogile model electron orbit must form

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Spectrum

Wave packets

Franhoffer lines

Clouds

The charge on a helium nucleus is equal to the charge of.

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Two electrons

Two protons

Two neutrons

One proton

The bunding energy per nucleon for iron is.

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zero

Maximum

Negative

Minimum

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

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