Question # 1

The unit of viscosity is SI system is:

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Kg^-1m sec^-1

Kgm^-1 sec^-1

Kg^-1m^-1 sec

None of these

The maximum stress that a material can withstand, is known as

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plastic point

elastic limit

yield point

ultimate tensile strength

The path followed by the projectile is known as:

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Cycle

Hyperbola

Trajectory

Route

The whole shape of the black body spectrum for all wavelengths was explained by the formula proposed by

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Max plank

Newton

Einstein

J.J. Thomson

10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?

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Each have same number of molecules

Don't have same number of molecules

Can't be predicted

None

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

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photo diode

light emitting diode

photo voltaic cell

none of these

The restoring force always directed towards the

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extreme position

mean position

both of them

none of them

The maximum possible error in the reading for a meter rod with least count 1 mm is:

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0.005 mm

0.05mm

0.5mm

5.0mm

F = I(L x B) is a

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vector

scalar

unit vector

none of these

The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.

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Equal to

Greater than

Smaller than

None of these

The impedance of RLC series resonance circuit at resonant frequency is

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Greater than R

Equal to R

Less than R

None of these

A cable breaks if stretched by moe than 2mm, it is cut into two equal parts. How much either [art can be stretched without breaking?

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25 m

1 mm

2 mm

0.5 m

All real heat engines are less efficient than carnot engine due to

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Work substances

Friction

0 K

All of these

A body will be in translation equilibrium only if the vector sum of all the external forces acting on a body is equal to

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Unity

Zero

Maximum

Double

The energy gap is insulators becomes very large and has the value

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Few electron volt (eV)

Some electron volt (eV)

Several electron volt (eV)

None of these

When a stress changes the shape, it is called the

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compressional stress

tensile stress

shear stress

any one of them

Beta particles have penetration of about:

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100 times more than that of the gamma particles

100 times less than that of an alpha ray

100 times more than that of an alpha ray

10 times more than that of an alpha particle

At what distance should a book be placed from a 50 Cd bulb so that the luminance on the book becomes 2 Im m^-2

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50 m

10 m

5 m

1 m

The path followed by a ballistic missile is called

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parabolic trajectory

ballisitic trajectory

both of them

none of them

The speed of commercial jet (air liner) is

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200 ms^-1

267 ms^-1

327 ms^-1

335 ms^-1

The dimensions [MLT^-1] refers to the quantity

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Force

Momentum

Impulse

None of these

The S.I. unit of permitivity are

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Nmc^-2

C² N^-1 m^-2

Nm² C^-2

NmC^-1

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