Question # 1

Two forces each of 10 N act on a body, if the force are inclined at 30° and 60° respectively with x-axis, then x-component of their resultant is:

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20 N

13.66 N

10 N

8.66 N

The resistance of a conductor does not depend on its

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mass

resistivity

length

cross-sectional area

The value of current at resonance in series LCR circuit is affected by the value

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R only

C only

L only

R, C and L

To convert galvanometer into ammeter we connect

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small resistance in parallel with galvanometer

small resistance in series with galvanometer

high resistance in series with galvanometer

high resistance in parallel with galvanometer

Acceleration of a body is positive, if the velocity of the body is

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constant

increasing

decreasing

none of them

The results of mechanical tests are usually expressed in terms of

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stress

strain

stress and strain

neither strees nor strain

When a body is vibrating, the displacement from mean position

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Increases with time

Decreases with time

Changes with time

None of these

The magnitude of induced emf depends upon the:

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Rate of decrease of magnetic field

Rate of change of magnetic field

Rate of increase of magnetic flux

Constancy of magnetic field

None of these

Centripetal acceleration is also called ______ acceleration:

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Tangential

Radial

Angular

None of them

When low energy photon interact with a metal,which of the following effect is likely to be taken place

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pair production

photoelectric

Compton effect

None of these

The graph showing the variation of displacement with time is a

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Sine curve

Straight line

Parabola

None of these

Angular momentum has the same unit as

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Impulse x distance

Linear momentum x time

Work x frequency

Power x time

The fluid which is incompressible and have streamline flow is called _________ fluid

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Ideal

Viscous

Non ideal

None of these

A point on the surface of the mirror where principle axis meets is called

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Focus

Centre of curvature

Pole

Aperture

When V₁ is approximately zero then Bernoulli's equation reduces to

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Torricelli's theorem

Venturi relation

Equation of continuity

None of these

In carnot cycle, there are adiabats

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One

Two

Three

Four

The thermometer which is suitable to measure 2000°C is

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Platinum thermometer

Gas thermometer

Vapour pressure thermometer

Pyrometer

A bullet is shot from a rifle.As a result the rifle recoils The kinetic energy of rifle as compared to that of bullet is

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Less

Greater

Equal

Cannot be concluded

The valence energy band may be either

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Completely filled

Partially filled

a and b

All of them

Fight of rocket in the space is an example of

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Newton's first law

Newton's third law

Newton's second law

all of them

The S.I. unit of an electric flux is

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NmC^-1

NmC^-2

Nm² C^-1

Nm² C^-2

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

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