Question # 1

Matter is made up of very tiny particles called

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Atoms

Molecules

Ions

None of these

Arsenic, antimony and phosphorus are the elements from

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third group

fourth group

fifth group

none of them

A string is stretched between two points and is plucked at right angles to its length, the vibration produced is:

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Longitudinal wave

Transverse wave

No vibration at all

None of them

When brakes are applied to a fast moving car, the passengers will be thrown:

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Forward

Backward

Downward

None of these

Semi-conductor elements have atoms with

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2 valence electrons

3 valence electrons

4 valence electrons

5 valence electrons

How much time, theα-particle more massive than an electron

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600

7000

5000

15000

Practically the quantity v/c is always:

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less than one

Equal to one

Greater then one

all of these

None of these

The bands below the valence band are

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completely filled and play active part in conduction process

completely filled and plays no part in conduction process

completely filled and play active part in conduction process

not completely filled and play no part in conduction process

The graph showing the variation of displacement with time is a

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Sine curve

Straight line

Parabola

None of these

The electrode connected with the positive terminal of the current source is called

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cathode

anode

electrolyte

position

In Bernoulli's theorem the relation between velocity and pressure is

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Inverse

Direct

None of the above

Both a and b

After alpha decay the atomic number of the atom

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increase by four

decreases by two

increases by two

decrease by four

Nuclei that have the same charge number but different mass number are called

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isotones

isomers

isotopes

isobars

Fog droplets are suspended in air when their weight is balanced by:

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Force of gravity

Upward trust due to air

Surface tension

None of these

The magnetic field outside the solenoid due to current is

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strong

zero

weak

uniform

The Boltzman constant has the value

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1.38 x 10^-23JK^-1

1.28 x 10^-23JK^-1

1.38 x 10^-26JK^-1

1.28 x 10^-26JK^-1

The mass of the object is a quantities measure of its

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speed

velocity

acceleration

inertia

The direction of velocity is along the direction of

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distance

displacement

acceleration

all of them

The total reactance of a series RLC circuit at resonance is

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zero

Equal to the resistance

Infinity

Capacitive

Gamma rays consist of steam of

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electron

proton

photons

all of these

The fractional change in resistance per kelvin is known as

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temperature coefficient

resistance coefficient

super temperature

critical temperature

Ball pen functions on the principle of

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Viscosity

Boyle's law

Gravitational force

Surface tnesion

A projectile on its path gets divided into two pieces at its highest point. Which is true?

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Momentum increases

Momentum decreases

Kinetic energy increases

Kinetic energy decreases

Rutherford performed an experiment on nuclear reactions in:

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1718 A.D

1818 A.D

1918 A.D

2001 A.D.

1701 A.D.

In series RC circuit when R=X_c, then the phase angle is

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0°

90°

70°

45°

If A represents linear momentum and c, the velocity of light, then unit of pc in international system of units is:

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Newton

Joule

Joule-Sec

Joule-s^-1

Watt

In a straight current carrying conductor, the direction of magnetic field can be found by

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right hand rule

left hand rule

head to tall rule

none of these

Which instrument is expensive and difficult to use?

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Voltmeter

Potentiometer

CRO

Both A and C

Both A and B

Example of vibratory motion is

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mass suspended from a spring

a bob of simple pendulum

mass attached to a spring placed

all of them

The distance from eye to near point is taken as:

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10 cm

15 cm

20 cm

25 cm

A typical rocket consumes about

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100 kg s^-1of fuel

1000 kg s^-1of fuel

10000 kg s^-1of fuel

100000 kg s^-1of fuel

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