Question # 1

In radioactive decay, the new element which is formed due to the disintegration of original element is called

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element

daughter element

parent element

none of these

The instrument used to gather information form the far side of the universe is

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Compound microscope

Radio telescope

Astronomical Telescope

Simple microscope

Structure of the nucleus was explained by

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J.J Thomson

Bohr

Millikan

Rutherford

A metastable stae:

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Is an excited state

Is that in which excited electron is stable

Is that in which excited electron is usually unstable

Means a time interval of 10^-8second

Both (A) and (C)

The current produced by moving a loop of wire across a magnetic field is called:

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Direct current

Magnetic current

Alternating current

Induced current

None of these

In the theory of dimensional analysis, heat may be properly represented by:

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ML²T^-2

MT^-2

ML^-1T^-1

None of these

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

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adiabatically

isothermally

isochorcally

isobarically

If work is done at the rate of 2 k j per second, then total work done is half an hour will be:

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0.5 Kwn

2 Kwh

1 Kwh

None of these

When a stress changes length, it is called the

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compressional stress

tensile stress

shear stress

any one of them

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

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Time constant

Decay constant

None of these

All of above

Lenz's law is the consequence of

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Mass

Energy conservation

Momentum conservation

Charge

Conductivity of semiconductor is of order of

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10^-6 to 10⁴ Ω^-1 m^-1

10^-10 to 10^-20 (Ωm)^-1

10⁷ Ωm^-1

None

The half-life of a certain element is 3.5 days at STP. If the temperature is doubled and pressure is reduced to half then half-life of the same element will be:

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1.75 days

3.5 days

7 days

14 days

In a couple, the resultant of two forces is

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2F

F

F / 2

Zero

When a light signal travels along the length of the optical fibre, the power lost by it is due to

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Reflection

Refraction

Seattering and absorption

Diffraction

Ductility is the property of a substance in which a material undergoes the deformation as

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Elastic deformation

Plastic deformation

Shear deformation

None of these

When a large number of atoms are brought close to one another to form a solid, each energy level of an isolated atom splits into sub-levels, called

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energy bands

energy shells

states

all of them

In the stress-strain graph stress is increased linearly with strain until a point is reached this point is known as

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Plastic limit

Plastic deformation

Proportional limit

Elastic behaviour

The mass of the object is a quantitative measure of

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Motion

Momentum

Inertia

None of these

Which of the following are the units of intensity of light

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Pois

Lux

Siemen

candela

When the vectors are mutually perpendicular then the product is

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Maximum

Minimum

Zero

None of these

The unit of inductance is equivalent to

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∨xs/A

∨xA/s

∨ x s/v

∨/A x s

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