Question # 1

The principle characteristics of an ideal standard are

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Inaccessible and Invariable

Accessible and Invariable

Accessible and Variable

None of these

A body is moving with constant velocity of 10 m/sec in the north-east direction. Then its acceleration will be:

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10 m/sec²

20 m/sec²

30 m/sec²

Zero

The molecules or ions in a crystalline solids are

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static

not static

randomly moving

all of them

The dimensions of viscosity are:

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M²L^-1T^-2

M^-1L¹T^-1

M^-1L^-1T

ML^-1T^-1

Diameter of the nucleus s of the order of

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10^-10m

10^-12m

10^-15m

10^-18m

Electric flux is:

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Cross product of two vector

Dot product of two vectors

A vector quantity

A scalar quantity

Both (B) and (D)

Two dissimilar metals joined at their ends kept at constant temperature constitute:

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Cell

Voltmeter

Thermocouple

Potentiometer

None of these

X-rays can penetrate in a solid matte through a distance of several:

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Kilo metres

Metres

Centimeters

A few angstroms

One micrometer

Which of the following medium/media can transmit both transverse and longitudinal waves:

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Solids

Liquids

Gases

All of them

One radian is:

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Greater than one degree

Less than one degree

Equal to one degree

None of these

Heating effect of current utilized in:

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Electric motor

Electric toaster

Electroplating

Electric kettle

Both (B) and (D)

The positions of two aeroplanes at any instant are at A (2, 3, 4) and B(5, 6, 7) from the origin in km. Find the distance between the two aeroplanes.

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3.2 Km

4.9 Km

5.0 Km

5.2 Km

The dimensions of Einsteins Equation E = mc²

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[ML^-2]

[ML²T^-2]

[M²LT²]

[MLT^-1]

When the movable mirror moves, the distance λ/4 the total path difference would be

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2λ

λ

2λ/4

None of these

Using monochromatic light, interference fringes are produced on a screen placed a distance D from a pair of slits of separation a.

The separation of the fringes is X.

a is now halved and D is increased by a factor of 4.

What is the new fringe separation?

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16 X

8 X

4 X

2 X

Molecules of a solid possess:

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Translation motion

Vibration motion

Rotation motion

Linear motion

S,I unit of magnetic flux is

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Weber metre^-2

Weber

Weber per metre

Weber per metre⁴

The magnitude of the electric field on the surface of a sphere of radius 'r' having a uniform surface charge density σ is

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σ/∈_o

σ/2∈_o

σ/∈_o r

σ/2∈_o r

Characteristics of optic fibre is/are

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Much thineer

Light weight

Extremely wide bandwidth

All of these

A frame of reference stationed on Earth in approximately an example of

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Inertial frame

Non-inertial frame

Every frame

None of these

A gale blows over a house. The force due to the gale on the roof is

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In the downward direction

In the horizontal direction

In the upward direction

Zero

The danger signals are red while the eye is more sensitive to yellow because

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Scattering in yellow colour is less than that of red

Red light is longer in wavelength than yellow light

Scattering in red is less than that of in yellow

Red colour has greater frequency than yellow light

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