Question # 1

Acceleration of the mass at any instant is given by

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a=k/m x

a= - m/k x

a = - k/m x

a=m/k x

When a wall is pushed by a person very strongly, he has done:

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Maximum work

Zero work

Positive work

Negative work

The property of fluids due to which they resist their own flow is called:

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Drag force

Surface tension

Viscosity

None of these

When the object lies between F and 2F, the image formed by is formed at:

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Real

Virtual

Diminished

Erect

A field in which the work done is moving a body along closed path is zero is called:

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Nuclear filed

Conservative field

Gravitational field

Non-conservative field

The phase at the positive peak is

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Π/2

Π

3Π/2

2Π

The motion in a plane is the motion in

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one dimension

two dimension

three dimension

four dimension

Which one of the following is the unit of electric field intensity

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JC^-1

Vm^-1

Cm^-1

CJ^-1

The solids are classified as:

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Metals

Crystalline

Amorphous

Polymeric

All except (A)

The SI unit of spring constant is identical with that of

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Force

Surface tension

Pressure

Loudness

When a horse pulls a cart, the force that makes the horse run forward is the force exerted by

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The horse on the ground

The horse on the cart

The ground on the horse

The ground on the cart

The number of seconds in one year are

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3.154 x 10⁶

3.154 x 10⁵

3.154 x 10⁴

3.154 x 10⁷

If 5000 lines per cm are ruled on different on a diffraction grating then the slit spacing will be

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5 x 10^-3A°

2 x 10^-4A°

5 x 10^-5A°

2 x 10⁴A°

When two surface are coated with a lubricant,then they

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Stick to each other

Slide upon each other

Roll upon each other

None of these

What will be the colour of the sky as seen from the earth if there were no atmosphere ?

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Black

Blue

Orange

Red

By the use of angular variable we can describe the

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Linear motion of a body

Angular motion of a body

Both

None of these

Cladding means a layer of ______ refractive index over the central core of ______ refractive index

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Lower, lower

Higher, lower

Lower, higher

None of these

A particle is moving in a circle with uniform speed v.In moving from a point to another diametrically opposite point.

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The momentum changes by mv

The momentum changes by 2mv

The kinetic energy changes by (1/2) mv²

The kinetic energy changes by mv²

The horizontal range of projectile, at a certain place, depends upon

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the mass of the projectile

velocity of projection

angle of projection

angel as well as velocity of projection

When the terminal velocity is reached the acceleration of a body moving through a viscous medium is

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Zero

Positive

Negative

Depends upon other factor

The momentum of a body is p and its kinetic energy is E its momentum become 2p its kinetic energy will be

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E/2

3E

2E

4E

A non-conducting semiconductor diode is:

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Forward biased

Poorly biased

Reverse biased

None of them

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