Question # 1

In which of the following state molecules don not leave their position?

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Solid

Liquid

Gas

Plasma

The energy stored in dam is:

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Potential energy

Kinetic energy

Chemical enegy

Nuclear energy

The vector which has the same effect as the combined effect of vectors:

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Negative vector

The vector

Resultant vector

Zero vector

The formula of Density is:

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m/v

v/m

m x v

None of these

The product of mass and _______ is called momentum;

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Velocity

Force

Acceleration

None

If W stands for work, F stands for force and S stand for displacement, than mathematical work is defined as

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W = P x S

W = F x v

W = F x r

W = F x S

A body is placed at height 'h' above the surface of the Earth.The value of 'g' is given by

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gh = Me/(R + h)2

gh = GMe/(R +h)2

gh = GMe/R2h

If velocity of a body becomes half that its energy K.E will be decrease to:

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Zero

Half

Double

4 Times

Convection of heat is a process of heat transfer due to;

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Random motion of molecules

Downward motion of molecules

Upward motion of molecules

Free motion of molecules

Normal human body temperature is:

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15 ^oC

37^oC

37^oF

98,6 ^oC

A couple is formed by

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Two forces perpendicular to each other

Two like parallel forces

Two equal and opposite forces in the same line

Two equal and opposite forces not in the same line

In simple harmonic motion, the acceleration of the body is…………. Proportional to the displacement.

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Inversely

Directly

Equally

Ration

How many tubes or electron guns used in a colour television set:

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Two

Four

Five

Three

If there is divergence of leaves by touching a body with electroscope then the body is:

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Semi conductor

Neutral

charge body

Insulator

Two charged spheres are separated by 2 mm. Which of the following would produced the greatest attractive force?

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+1 q and +4q

-1 q and -4q

+2 q and +2q

+2 q and -2q

The value or current I passing through a conductor is inversely proportional to:

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Temperature

Potential difference

e.m.f.

resistance

Astronauts is space need to communicate with each other by radio links because:

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Sound waves travel very slowly in space.

Sound waves travel very fast in speace

Sound waves cannot travel in space

Sound waves have low frequency in space

The temperature at the centre of sun is.

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10 million k

20 million k

30 million k

35 million k

The S.I unit of intensity of sound is:

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Wm

Wm2

Wm-2

Wm-1

The symbol of atomic mass number is:

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A

X

N

Z

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

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Electromagnetic waves

Sound waves

Both a and b

Transverse waves

George Boole invented:

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Boolean algebra

Arithmetic algebra

Mean algebra

Geometry

The dimensions of work are.

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[MLT-1]

[MLT-2]

[ML2T-2]

[MLT]

The magnifying power is also called

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Resolving power

Angular magnification

Strength of eye

None of these

Information carrying capacity of optical fibre called.

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Capacity

Band width

Immunity

Ability

If an object lies at focus point F in front of a converd lens, its image is formed at.

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2F

F

3F

Infinity

Pi radian is equal to.

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0^o

90^o

180^o

57.3^o

The slope of velocity time graph shows

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Total distance covered

Average acceleration

Instantaneous acceleration

Torque

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

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Decreases

Remain same

Increases

Becomes zero

The dimensions of angular velocity are

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[LT-1]

[LT-2]

[T-1]

[L-1T-1]

The accepted value for speed of light in vacuum

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2.99 x 10⁸m - sec^-1

2.99 x 10⁶m - sec^-1

2.99 x 10⁸km - sec^-1

2.99 x 10⁸m - h^-1

Which material has maximum viscosity

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Glycerin

Plasma

Methanol

Water

Bright fringes are also called as

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Minima

Maxima

Wave front

Ray of light

Coulomb's force is:

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Conservative force

None conservative force

Similar to frictional force

None of the above

Internal frame is a frame is which

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1st law holds

2nd law holds

3rd law holds

Kelvin's law holds

The P.D develop in case of silicon is:

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0.7V

0.3V

0.5V

0.9V

When meta I is heated sufficiently electrons are given off by the metal. This phenomenon is known as.

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Photoelectric effect

Piezo electric effect

Thermionic emission

Secondary emission

In case of A.C. through resistor V and I are

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At 0^o with each other

At 180 ^o with each other

At 90^o with each other

At 270 ^o with each other

Two down and one up quarks make

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Proton

Neutron

~~photon~~

Positron

The output from a full wave rectifier is

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An ac voltage

A dc voltage

Zero

A pulsating unidirectional voltage

In case of inductor , energy is stored in the

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Electric field

Magnetic field

Potential field

Gravitational field

When some di electric is inserted between the plates of a capacitor, then capacitance.

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Decreases

Increases

Becomes zero

Becomes infinity

To convert a galvanometer into an ammeter, we connect with it a

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Shunt resistance

Low value parallel

Low value by pass resistor

All of above

The longest wavelength of Paschen series is.

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656 nm

1094 nm

1875 nm

2000 nm