Question # 1

To see the minor details of the object by microscope, it should have:

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High magnifying power

High resolving power

Am objective of larger focal length

None of these

A changing magnetic flux creates around itself

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An electromotive force

An electric field (changing electric flux)

Magnetic field

None of the above

When a nucleus emits an alpha particles, its charge number decreases by

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3

2

6

5

Work is a:

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Scalar quantity

Vector quantity

Base quantity

None of these

There is certain frequency below which no electrons are emitted from the metal surface, this frequency is known as

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maximum frequency

minimum frequency

threshold frequency

all of these

The velocity given to a body to go out of the influence of earth's gravity is known as:

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Terminal velocity

Orbital velocity

Escape velocity

None of these

The Stephen-Boltzmann law for the black body radiation is given by

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E = T²

E = -T²

E = T⁴

E = -T⁴

Internal energy is the sum of all the forms of

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K.E

P.E

both of them

none of them

If the acceleration of a body is negative, then slope of the velocity-time graph will be:

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Zero

Positive

Negative

Infinity

If water rises 4 cm in a long, thin tube because of capillary action, then, under corresponding conditions of use, the rise (in the tube) of a liquid whose density is 2 g/cm²will be

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1 cm

2 cm

8 cm

None

In the equation E=mc² value of c is?

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186000 miles per hour

186000 miles per sec

3 X 10⁸m/sec

Both A and C

Both B and C

The original source of tides is

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Ocean

Sun

Earth

Moon

For constructive interference path difference should be

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Integral multiple of λ/2

Integral multiple of λ

Odd integral multiple of λ

Odd integral multiple of λ/2

The temperature scale approved in SI units is:

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Calslus scale

Kelvin scale

Fehrenhelt scale

None of these

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser,As a result its capacitance

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Increase k time

Decrease k times

Decreases 1/k times

Remains unchanged

The ratio of nuclear magneton and and Bohr magneton is

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m_e/m_p

m_p/m_e

m_e/m_p

2m_p/m_ez

A particle of mass 'm' at rest is acted upon by a force 'P' for a time 't' its kinetic energy after an interval 't' is

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P²t²/m

P²t²/2m

P²t²/3m

Pt/2m

The splitting of white light into several colors on passing through a glass prism is due to

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Refraction

Reflection

Interference

Diffraction

If a car at rest accelerates uniformly to a speed of 144 km/h in 20 s it covers a distance of

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20 m

400 m

1440 m

2880 m

Crystalline solids are also

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Metals

Ionic compound

Ceramics

All of them

Experiments revealed that the ratio of the stress to the strain is a constant value for

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different material

all material

a given material

all of them

What is the S.I. unit of dipole moment ?

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cm

cm²

cm^-1

cm^-2

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