Question # 1

One kilogram of different substances contain

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same number of molecules

different number of molecules

may be same or different

none of them

The velocity gained by the fluid in falling through the distance (h_{1 - h}_{2) under the action of gravity is equal to the speed of the action of gravity is equal to the speed of the}

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orifices

efflux

fluid

none of them

Split rings act as

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Vibrator

Resistor

Motor

Commulator

The electric field intensity at a point due to a point charge

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Falls off inversely as the distance

Falls off inversely as the square of distance

Remains unchanged with distance

Increase directly as square of distance

Radian is defined as the angle subtended at the center of a circle by an arc of:

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Length equal to its diameter

Length equal to its radius

Any length

None of these

The magnitude of the displacement is a line from initial position to final position which is

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straight

curved

either be curved or straight

none of them

The instrument which detects the instant at which external pressure becomes equal to the systolic pressure is

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stethoscope

thermometer

manometer

barometer

Magnetic flux and flux density are related by

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Flux density = flux x area

Flux density = flux / area

Flux density = flux - area

None of these

Electric lines of force

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Intersect each other

Are always parallel

Are always anti-parallel

Never intersect

None of these

Ferromagnetic substances lose their magnetism when heated above a certain temperature, known as

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critical temperature

curie temperature

high temperature

fixed temperature

The waves which propagate by the collision of material particles are known as

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e.m. waves

mechanical waves

light waves

microwaves

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10^-15 m is

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9 x 10⁵ V

9 V

8 x 10⁶ V

80 V

The wave nature of light was first proposed by

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Huygen

Thomas Young

Newton

Compton

When satellite is moving in a circle, it has an aceleration

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mV²/r

ωr/V

V²/r

ωV/r

Systematic error refers to an effect that influences particular quantity for the measurements which are

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All

Some

None

a and b

The renewable energy source is a biomass which is a

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Rare source

Unlimited source

Potential source

None of these

The kinetic energy acquired by a mass m in traveling a certain distance d.starting from rest. under the action of a constant force is directly proportional to

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√m

Independent of m

1 / √m

m

In 420 days, the activity of a sample of polonium (Po) fell to one-eight of its initial value. The half-life of polonium is :

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140days

45days

87days

90days

A ballistic missile moves under the result of the superposition of

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one independent motion

two independent motions

one dependent motion

two dependent motions

An orbital motion in which an artificial satellites adopts

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Circular path

Nearly circular path

Elliptic

None of these

Each domain contains the atoms of range of

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10^-10 to 10¹⁸

10¹⁰ to 10¹⁶

10¹² to 10¹⁷

10¹² to 10¹⁶

What remains constant when the earth revolves around the sun?

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Angular momentum

Linear momentum

Angular kinetic energy

Linear kinetic energy

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