Question # 1

The locus of all the points in the same phase of vibration is called:

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Wave packet

Wave front

Wave number

None of them

Newton's laws are adequate for speeds that are

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low compared with the speed of light

equal to the speed of light

greater than the speed of light

all of them

At constant temperature, if the density of the gas is increased, its pressure will:

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One kg of a substance

Unit volume of a substance

One mole of a substance

None of these

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.

When certain nucleus emits anα particle, its mass number:

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Increases by one

Decreases by one

Remain same

Decreases by four

None of these

Centripetal acceleration is also called ______ acceleration:

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Tangential

Radial

Angular

None of them

The value of current gain of n-p-n transistor is of the order of

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tens

hundreds

thousands

ten thousands

Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:

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Peak value

RMS value

Instantaneous value

Peak-to-peak value

Both (A) and (C0

The ratio of average e.m.f in the coil tot he time rate of change of current in the same coil is called

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Mutual induction

Mutual inductance

Capacitance

Self inductance

Bernoulli's equation is based upon law of conversation

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Mass

Momentum

Energy

None of these

The diameter of an atom is of the order

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10^-125m

10^-11m

10^-10m

10^-9m

With tremendous information carrying capacity is called

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Data entry

Band width

Word processing

None of these

The frequency of an open pipe is f. if one end is closed then its fundamental frequencywill be:

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f/2

3f/4

f

2f

If the earth were to rotate faster than its present speed the weight of an object will

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Increase at the equator but remain unchanged at the poles

Decreases at the equator but remain unchanged at the poles

Remain unchanged at the decrease but decrease at the poles

Brownian motion confirms the truth of :

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Wave theory of light

Boyle's law

Kinetic theory of gases

Adiabatic process

Speed of light in vacuum depends upon:

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Frequency

Wavelength

Amplitude

None of above

When the magnitude of the drag force becomes equal to the weight then net force acting on the the droplet is

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Zero

Maximum

Remains the same

None of these

A _____ lens is used in the apparatus to get newton's ring:

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Plano-concave

Plano-convex

Convexo concave

Double covex

In the stress-strain graph, stress is increased linearly with strain until a point is reached, this point is known as

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plastic limit

plastic deformation

proportional limit

elastic behaviour

The compound having highest %age of oxygen is:

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CH₃COOH

C₂H₅OH

H₂O

CH3COCH₃

At every degree Celsius rise of temperature, the volume of a given mass of a gas at constant pressure increases by

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1/273 of its value at 0°C

1/373 of its value at 0°C

1/173 of its value of 0°C

1/700 of its value at 0°C

The original source of fossil fuels is

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Geothermal

Biomass

Sun

None of these

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