Question # 1

Momentum is defined as the product of

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Mass and acceleration

Force and acceleration

Mass and velocity

Force and velocity

A simple way to know how much a body is hot or cold is

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Our sense of touch

Termometer

Thermostat

Setback state

The product of force and distance is :

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Force

Work

Torque

Nil

Einstein's mass-energy equation relation is:

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E =1/2 mc²

E =mc²

E =m²c

E = 2 mc²

Coefficient of friction between tyre and dry road is.

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0.6

1

0.05

0.2

Heat is an important form of

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Matter

Energy

Wind

Force

The bad conductor of heat is:

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Iron

Copper

Air

Aluminum

In Which of the following state molecules do not leave their position?

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Solid

Liquid

Gas

Plasma

Where there is no air the atmospheric pressure is:

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Zero

101300 Pa

7 nm Hg

1000 Nm^-2

Which law of motion is called law of inertia:

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first law of motion

Second law of motion

Third law of motion

Law of conversation of momentum

Archimedes is a scientist:

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Greek

Italian

French

English

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

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Resistance

Specific resistance

Resistor

Resistivity

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

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Pitch

Quality

Loudness

Intensity

Capacitance is defined as:

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VC

Q/V

QV

V/Q

The waves in which particles of the medium vibrate perpendicular to the directions waves are:

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Electromagnetic waves

Sound waves

bothe a and b

Transverse waves

Specific resistance of silver = ________ x 10^-sOhm-meter

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5.25

2.75

1.69

1.62

Which statement is true about the magnetic poles?

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Unlike poles repel

Like poles attract

Magnetic poles do not effect each other

A single magnetic pole does not exist

The line which passes through pole of the mirror and center of curvature is called principal:

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Axis

Focus

Line

None of these

Which one is a safety device?

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Switch

Fuse

Circuit breaker

Both B and C

What is fitted in telephone receiver?

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Electromagnet

Diaphragm

Both a and b

None of these

the water waves after striking the hurdle will:

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reflect

refract

diffract

all a b and c

Release of the energy by the sun is due to:

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Nuclear Fussion

Nuclear Fission

Burning of gases

Chemical reaction

Substances that don't flow easily has

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Large co-efficient of viscosity

Small co-efficient of viscosity

Medium co-efficient of viscosity

Zero-coefficient of viscosity

The unit of rotational K.E. is

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rAD/SEC

Js

J

Kgm2

On loading the prong of a tuning fork with wax, the frequency of sound.

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Increases

Decreases

Remains same

First increases then decrease

In red light is used as compare to blue light then fringe spacing.

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Decreases

Remain same

Increases

Becomes zero

the velocity of sound is maximum at 20 ^oC in

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Lead

Copper

Glass

Iron

If the are of a circle equals its radius, then the angle subtended at the center will be

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1 degree

One rotation

One radian

Half rotation

Almost all the raw energy is librated from

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Heat

Earth

Light

All of these

The dot product of two vectors A and B will be zero, if angle between A and B is

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Zero

30^o

90^o

180^o

The process followed by Newton for the determination of speed of sound in air is

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Adiabatic

Isothermal

Isobaric

Isochoric

A diatomic gas molecules has

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Translational energy only

Rotational energy only

Vibrational energy only

All translational, Rotational and vibrational energy

A force of 10N makes an angle 30o with y axis. Then magnitude of x -component is.

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5 N

8.66 N

10 N

Zero

The wavelength associated with the protons moving at speed of 40 m/s is.

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7.20 nm

9.02

15.7 nm

17.3 nm

A pair of quark and anti quark makes a.

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Meason

harden

Lapton

Baryon

The current flowing through each resistor of equal resistance in parallel combination is.

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Same

Different

Zero

Infinite

The value of e/m is smallest for

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Proton

Electron

Beta particle

Positron

James chadwick discovered:

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Proton

Positron

Neutron

Electron

The output from a full wave rectifier is

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An ac voltage

A dc voltage

Zero

A pulsating unidirectional voltage

The slope of q-t curve at any instant of time gives.

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Voltage

Current

Charge

Botha a and b

The number of neutrons in Li are

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2

3

4

7

___ is correct relation.

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IT = 10^-4G

IT = 10⁴ G

IT = 10² G

IT = 10^-2 G

Those elements whose charge number z is greater then __________ are unstable:

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80

79

82

83

The reverse saturation current in a PN junction diode is only due to:

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Majority carriers

Minoritycarriers

Acceptor ions

Donor ions