Question # 1

The mathematical formula of thermal conductivity is

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k =Q/t x L/A (T1 - T2)

k =Q/t x L/A (T1 + T2)

k =t/Q x L/A (T1 - T2)

k =2Q/t x L/A (T1 + T2)

The motion of the rider in Ferris wheel is.

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Vibratory

Translatory

Rotatory

Linear

The value of absolute zero kelving temperature is:

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273^oC

273^oK

273^oF

-273^oC

In thermo flask radiation is stopped by using :

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Green color

Transparent

Silver color

Nil

More radiation is reflected by the surface:

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White

Coloured

Black

Rough

Which of the following is the unit of momentum?

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Nm

Kg ms^-2

Ns

Ns^-1

Newton's first law of motion is known as law of ___________________

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Force

Inertia

A and B both

None

Those objects which do not conduct electricity are called.

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Insulator

Semi conductor

Nil

Conduct

After tilting if body come back to its original position then the body is in:

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Stable equilibrium

unstable equilibrium

Neutral equilibrium

Equilibrium

If there is no change in state of motion, then the body is said be i:

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Rest

Motion

Equilibrium

Rest & motion

Significant figures in an expression are.

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All the digits

All accurately known digits

All the accurately known digits and the first doubtful digit.

All the accurately known digits and all the doubtful digits.

Which element is used to locate the ulcer in brain?

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Iodine-131

Phosphorus-32

Carbon-14

Potassium-40

What does the term e-mail stand for?

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Emergency mail

Electronic mail

extra mail

external mail

The ratio of external force applied on the spring to displacement is called:

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Hook's law

Constant

Spring constant

the phenomena which is used in applying paints on the surface of different articles is called:

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electroplating

electroscope

electrostatic induction

electrolytes

The value of acceleration in simple harmonic motion at mean position is

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Maximum

Zero

10 N

Both a , b

When an electric current passes through a conductor, which field is produced around it?

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Electric field

Magnetic field

Gravitational field

Electrostatic field

The unit of electrical energy is:

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Joule

Watt

Volt

Electron volt(eV)

The example of magnetic disk is:

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Compact disk

Floppy disk

Audio cassette

Video cassette

Which technology is used in mobile phone:

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Heat

Radio

Light

Laser

A positive electric charge:

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Attracts other positive charge

Repels other positive charge

Attracts a neutral charge

Repels a neutral chage

Mathematical formula of capacitance of a capacitor is:

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C = QV

C = Q/V

C = V/Q

C = V2/Q

The dimensions of angular velocity are

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[LT-1]

[LT-2]

[T-1]

[L-1T-1]

The light signal in Opticla fiber must be regenerated by advice called.

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Regenerator

Generator

Repeater

Diode

Time period of simple pendulum only depends on

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Mass

Amplitude

Density

Length

When two waves of same frequency travel in opposite direction, the phenomenon will be

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Diffraction

Stationary waves

Polarization

Interference

Two quantities involved in work are

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Force and speed

Force and velocity

Force and displacement

Force and acceleration

No body begins to move or comes to rest of itself was given by

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Newton

Pascal

Bernoulli

Bu Ali Sina

Value of triple point of water is given as.

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Zero K

100 K

273.16 K

373.16 K

The frequency of 2nd pendulum is

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0.5 Hz

1 Hz

1.5 Hz

2 Hz

Heat is form of.

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Power

Momentum

Energy

Torque

The components of a vector which are perpendicular to each other are called

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Horizontal components

Vertical components

Rectangular components

All of these

When a body is vibrating its displacement from mean position

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Remains constant

Changes with time

Become(-)ve

None of these

The substance which atom cooperates with each other in such a way so as to exhibit a strong magnetic field is called.

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Ferromagnetic

Paramagnetic

Diamagnetic

Non magnetic

The line radiations emitted from by hydrogen filled discharge tube can be analyzed into.

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Band spectrum

Line spectrum

Continuous spectrum

Absorption spectrum

For which material medium, force between two charged particles is maximum.

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Ammonia

Germanium

Mica

Teflon

The unit of Plank's constant 'h' is.

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JC

J/C

JS

J/S

Semiconductor diodes are called:

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Ohmic

non ohmic

Both a & b

none of above

A charge Q is divided into tweo parts q and Q-q and seperated by a distance R. The force of equilibrium between them will be maximum when:

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q=Q/4

q=Q/2

q=Q

None of these

If the medium between the charges is not free space then electrostatic force will.be

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Increase

Decrease

Remain same

None of these

The potential difference between the head and tail of an electrical to

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600 Volt

700 Volt

800 Volt

900 Volt

The function of three anodes a C.R.O is

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To accelerate electrons only

To focus the electrons only

To control the brightness of spot on screen

To accelerate and focus the electrons

Write the SI unit of magnetic flux.

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Tesla

Weber

Weber m-2

Tesla m2

Main reason for world wide use of A.C. is

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It is cheaper

Transmitted

Botha a and b

Reaches in short time