Question # 1

According to Archimedes, upthrust is equal to

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Weight of displaced liquid

Volume of displaced liquid

Mass of displaced liquid

None of these

1 litre is equal to:

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10² m³

10^-3 m³

10³m³

10⁶m³

Rate of change of velocity is known as.

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Acceleration

Speed

Velocity

Distance

Sin 45^ois

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0.707

0.5

1

0.2

the value of gravitational field strength near the earth is ________ Nkg^-1.

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1.62

100

10

160

The Atwood machine can be used to find the acceleration due to gravity using the equation

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g = 2 (m1 x m2)/(m1 + m2) a

g = (m1 - m2)/(m1 + m2) a

g = (m1 + m2)/(m1 - m2) a

According to law of conservation of energy increases in P.E is equal to:

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Increase K.E

Decrease in K.E

Decrease in P.E

None

Falls ceiling is done to:

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Lower the height of ceiling

Keep the roof clean

Cool the room

Insulate the ceiling

The work done will be zero when the angle between the force and the displacement is:

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45°

60°

90°

180°

A body possesses if it is capable to do work:

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Energy

Power

Force

All

The formula of Density is:

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m/v

v/m

m x v

None of these

Short form of information Technology is:

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IT

ITS

CBIS

IS

The SI unit of electric field intensity is:

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NC-2

NC-1

Ns

Nm-1

BASIC is a:

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High level language

Low level language

Assembly language

Machine Language

A unit of electric charge, equal to the charge of 6.25x10¹⁸ electrons is:

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Electricity

Coulomb

Electric potential

Volt

A device which has two ways of communication is:

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television

radio

hard disk

mobile phone

The character by which lound and faint sound can be distinguished is called:

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Pitch

Quality

Loudness

Intensity

The S.I unit of potential difference is:

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Ampere

Coulomb

Volt

Watt

The speed of sound in a liquid is …………..than that in gases:

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Ten times

Fifteen times

Five times

Two times

When resistances are connected in parallel, the current passing through them is:

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Same

Zero

Different

Infinite

It is used in satellite communication:

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Radio waves

Micro waves

Light waves

Electrical waves

In mathematical form of Ohm's law, "R" is:

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Resistance

Specific resistance

Resistor

Resistivity

In stationary waves, the velocity of particle at the node is.

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Maximum

Infinite

Zero

Varible

The curve representing an adiabatic process is called.

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An adiabatic

An isotherm

Both of these

None of these

The SI unit of flow rate are

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m-sec^-2

m³-sec^-1

m³-sec^-2

m-sec^-3

Before the launch of a rocket the mass of fuel of the rocket is approximately consists of.

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60%

50%

80%

100%

At constant temperature and pressure, if volume of given mass of a gas is doubled then density is.

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Doubled

1/4 original

1/2 of original

Unchanged

A force of 100 N makes an angle of 60o with Y- Axis, its horizontal component is.

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50 N

60 N

70.7 N

86.6 N

According to first law of thermodynamics the quantity which is conserved.

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Force

Momentum

Energy

Power

Efficiency of a heat engine working between 27 ^oC and 32 ^oC will be.

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50%

90%

40%

62%

Total change in momentum of an isolated system is

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Always (+) ve

Always (-) ve

Has maximum value

Zero

When a particle is moving along a circular path its projection along the diameter executes

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Linear motion

Vibratory motion

Rotatory motion

SHM

The dimensions of work are

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MLT^-1

MLT^-2

ML²T^-2

ML^-1T^-1

For workers in nuclear facilities is, a weekly does of is normally considered safe

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1.0 msv

5.0 msv

2.0 msv

3.0 msv

If a charge Q flows through any cross section of the conductor in time t, the current I is

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I=Qt

A cable breaks if stretched by more than 2mm. It is cut into two equal parts. How much either part can be stretched without breaking?

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25 m

1mm

2mm

0.5 m

The number of neutron present in a nucleus in a given by

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N = A+Z

N = A- z

N = Z - A

N = A X Z

The conductor experience force, placed in magnetic above:

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Move towards weaker part of field

Move towards stronger part of field

Remains at rest

Move upwards in space

Electrons are

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Hadrons

Laptons

Quarks

Baryons

Heat generated by a 40 W bulb in one hour is.

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140 J

1440 J

14400 J

144000 J

The value of e/m is smallest for

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Proton

Electron

Beta particle

Positron

Bremsstrahlung radiation are examples of

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Atomic spectra

Molecular spectra

Continuous spectra

Discrete spectra

A radio active substance has a half life of four months. 3 -fourth of the substance will decay in:

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6 months

8 months

12 months

16 months

The amount of energy equivalent to 1 a.m.u is

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931.5 MeV

93.15 MeV

9.315 MeV

2.224 MeV