Question # 1

The dimensions of viscosity are:

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M²L^-1T^-2

M^-1L¹T^-1

M^-1L^-1T

ML^-1T^-1

If a mass of 10 gm is suspended from a spring of k = 9.8 Nm^-1, then the extension will be:

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1 cm

1 m

10 mm

None of these

The S.I unit of frequency is

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Vibrations s^-2

Ms^-1

Hertz

s^-1

The ratio of the r.m.s value of the applied voltage to the r.m.s value of resulting a.c. is

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Impedance

Inductance

Reactance

Resistance

Carnot heat engine only used

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isothermal processes

adiabatic processes

both of them

none of them

The alternative voltage of current is actually measured by:

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Its RMS value

Square root of its mean square value

Instantaneous value

Peak value

Both (A) and (B)

The first super conductor was discovered in

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1811

1890

1901

1911

In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:

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Greater than

Equal to

Smaller than

None of these

A body of mass 5 kg is acted upon by a total change n momentum will be:

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10 NS

100 NS

140 NS

200 NS

If force and displacement are in opposite direction, the work done is taken as

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Positive work

Negative work

Zero work

Infinite work

The electrical forces between the molecules of a liquid are

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Repulsive

Attractive

Both A and B

None

How many electrons are in one Coulomb ?

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6.2 × 10^-23

6.2 × 10^-21

1.6 × 10^-19

Zero

According to Bernoulli s theorem velocity and pressure

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Are directly proportional

Are inversely proportional

Have no relation

Are equal

Identify the vector quantity

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Heat

Angular momentum

Time

Work

The weight of 100 kg man in an elevator going up with an acceleration of 4ms^-2will be

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908 N

490 N

100 N

1380 N

Optical device used in spectrometer

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Simple microscope

Compound microscope

Telescope

Any of them

The SI unit of stress is same as that of

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Momentum

Pressure

Force

Length

A body is moving with a uniform speed along a straight line.Its angular momentum with respect to a fixed point away from the line

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Increases as the body moves away from the point

Decreases as the body moves away from the point

Is zero

Is constant and does not depend on the position of the body

Under what circumstance would a vector have components that are equal in magnitude ?

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45^o , 145^o , 245^o

135^o , 225^o

45^o , 135^o , 225^o and 315^o

None of these

Coulomb's force is also

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Single force

Mutual force

Self force

None of these

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

The temperature at which the vibrations become so great that structure of the crystal breaks up, is called:

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Critical temperature

Temperature of vaporization

Melting point

Both A and C

Both A and B

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