Question # 1

Binding energy per nucleon is.

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Greatest for heavy nuclei

Least for heavy nuclei

Greatest for light nuclei

Greatest for medium weight nuclei

Which one is not a semiconductor.

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Go As

Ge

Sc

In

A newly prepared radioactive nuclide has a decay constant Lamda of 10-6 s-1 What is the approximate half life of the nuclide.

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1 hour

1 day

1 week

1 month

If the transformer turns ratio is 2 and the impedance of primary coil is 250 Ohms then the impedance secondary coil will be.

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125 Ohms

250 Ohms

500 Ohms

1000 Ohms

A force passing through the centre of gravity of a body

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Causes its translational motion

Causes its rotational motion

Holds the body in equilibrium

Produces both translational and rotational motion.

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 X_c = X_l, this condition is called.

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Equality

Balanced

Resonance

Equlibrium

Which of the following proves that light waves are transverse in nature.

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Diffraction

Interference

Polarization

Refraction

The input resistance of a JFET is of the order of.

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1 M Mega

10 M Mega

100 M Mega

1,000 M Mega

Since a diode permits the flow of current only in one direction so it can be used as.

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An oscillator

A rectifier

A phot deflector

A transistor

A diver leaving the diving board makes a somer sault in the air.

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This is due to gravitational force

The moment of inertia is decreased during the turn

His moment of inertia is increased

He pushes at the air for making the true

What is the quantitative description of the effect of radiation on the living tissue.

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Radiation dosimetry

Radioactive dating

Telemetry

Dosage

The unit generally used for measuring astronomical distances is.

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Parsecs

Light year

Metre

Kilometer

The product of force and duration of impact is called.

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Density

Momentum

Torque

Impulse

Light entering glass will not suffer change in

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Wavelength

Direction

Velocity

Frequency

Which characteristics successively increases in the musical scale.

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Pitch

Quality

Loudness

Amplitude

The escape velocity

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Increases with the increase of the mass of the body

Depends on the type of body used

Is independent of mass of the body

Decreases with the increases of the mass of the body

The temperature of a certain substance in Celsius scale of temperature is 800 ^oC in Kelvin scale it is.

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173 K

931 K

1073 K

1193 K

A body of mass 8 kg moves along a circle of radius 4 m with constant speed of 88 m s-1 The centripetal force on the body is.

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10 N

128 N

48 N

148 N

What units are used to rate electrical fuses.

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Volts

Ampere

Watts

Hertz

Which of the following pair does not have identical dimensions.

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Energy and torque

Momentum and impulse

Mass and moment of inertia

Energy and work

Mosley's law establishes the X-rays fluorescence of target element with is.

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Atomic weight

Atomic number

Density

Lattice constant

Charge carriers in thermocouples are.

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Anions

Cations

Electrons

Protons

A freshly made sample of radioactive material gives a count rate of 8,000 counts per minute After twenty days it gives a count rate of 500 counts per minute What is the half life of the materials.

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5 days

10 days

40 days

20 days

If an object moves with velocity of light the apparent length of the object moving the direction of motion becomes.

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Larger

Smaller

Zero

Infinity

Which part of hole located in the centre of the eye that allows light to enter the retina.

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Iris

Pupil

Cornea

Fovea

In an elastic collision

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K.E. is conserved

Both K.E. and momentum are conserved

K.E. is not conserved

Only momentum is conserved

Two convex lenses of equal focal length 'f' are placed in contact, the resultant focal length is

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Zero

1

2f

f/2

At which temperature a ferromagnetic material becomes paramagnetic on healing.

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Kelvin temperature

Celsius temperature

Curie temperature

Fahrenheit temperature

In de Brogile model electron orbit must form

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Spectrum

Wave packets

Franhoffer lines

Clouds

The image of an object 5 mm high is only 1 cm high. The magnification of the lens is

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0.2

0.5

1

2

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