Question # 1

In describing function of digital systems, 1 represents:

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Closed switch

True Statement

Lighted bulb

Only (B) and (C)

All are true

The motion of a body in a straight line is the motion in

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one dimension

two dimension

three dimension

four dimension

The branch of physics which deals with the structure and properties of solids is called:

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Plasma physics

Solid state physics

Any of above

Astrophysics

Smaller the damping, the resonance will be

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more flat

more sharp

both of them

none of them

Two forces each of the magnitude F act perpendicular to each other. The angle made by the resultant force with the horizontal will be:

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30°

45°

60°

90°

The percentage of available heat energy converted into work by a diesel engine is roughly

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35 %`

40 %

35 - 40 %

25 %

The electric field, magnetic field and the direction of their propagation are mutually

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perpendicular

parallel

none of these

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

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inverting input

non-inverting input

any one of the input terminal

none of them

The value of E₀in coulomb's law is:

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9 x 10⁹Nm²C^-2

8.85 x 10^-12C²N^-1m^-2

8.85 x 10^-12Nm²C^-2

9 x 10⁹C²N^-1m^-2

An induced current can be produced by

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Constant magnetic field

Changing magnetic field

Varying electric field

Constant electric field

None of these

Astrophysics is a branch of physics, which deals with

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Sub-atomic

Stars and galaxies

Light and sound

Music

The temperature at which all the gases become liquid is called:

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273 K

-273 K

Absolute Zero

Both (B) and (C)

The product of mass flow per second with velocity is

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Momentum

Acceleration

Force

Displacement

In Young's double slit experiment fringe width (or fringe spacing) depends

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inversely on wavelength

directly on wavelength

directly on square of wavelength

inversely on square of wavelength

The distance between the concentric wavefronts is

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half wavelength

one wavelength

one and a half wavelength

none of them

A convex ens acts as diverging lens when the object is placed

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Between F and 2F

At 2F

Within the focal length

Beyond 2F

One radian is equal to

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360^o/π

58^o

57^o

57.3^o

The weight of the body at the centre of the earth is.

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Infinite

Zero

Slightly less than that at the equator

Slightly more than that at the equator

The shape of crystals other than a cube have

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Right angles

Not right angles

Not corners

None of these

Dimension of G are

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[ML³T²]

[M^-1L²T²]

[M^-1L³T²]

Which of the following is an optically active material

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Solution of cane sugar

Liquid nitrogen

Mercury

Polaroid

The magnifying power of a compound microscope can be increased if we use objective lens of

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Large focal length

Small focal length

Same focal length

None of these

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