Question # 1

What is the focal length of a normal eye lens.

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1 mm

2 cm

25 cm

1 m

Nuclear force exists between

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Proton proton

Neutron -neutron

neutron -proton

All of these

Thermodynamics deals with

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Isolated systems

The interactions among various parts of the system

The microscopic behavior of a system

The interactions between system and surrounding

If the source of emf is traversed from negative to positive terminal the potential charge.

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Is negative

Is positive

Is zero

Remain the same

Which one among these contacts in a transistor is non rectifying.

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Base

Emitter

Collector

None of these

The number 0.02 x 10^-8in standard form will be written as.

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2 x 10^-10

2 x 10^-8

20 x 10^-8

20 x 10^-6

Efficiency of a half wave recitifier is.

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Almost negigible

More than full wave rectifier

Less than full wave rectifier

Equal to full wave rectifier

A breaker is full of water with an ice piece floating The ice place has a lead piece in it When ice cube mells then.

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Water overflows

Level falls

Level remains unchanged

Density increases

Which one of the following does not have the same dimenstions.

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Energy ,work, heat

Pressure, stress, Young's modulus

Voltage, electromotive force, potential difference

Electric flux, electric field, electric dipole moment

The distribution of electrical charge i an object caused by teh influence of nearby charges is called.

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Electric potential

Electrostatic induction

Electric flux

Electric dipole moment

Why freezer a refrigerator is located in the top section

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Motor is not affected

Heat gained from environment is less

The entire chamber of freezer is cooled quickly

Heat gained from environment is more

If positive terminal of the battery is connected to n-type and negative terminal of the battery is connected to p-type then the diode is.

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Saturated

A gate

Forward biased

Revere biased

Bracket and plunk series of spectral lines lye in the

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Visible region

Ultraviolet region

Far infrared region

Infrared region

The relation between the voltage and current that flows in a resistor is.

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V = 1/R

R = vi

V = I2 R

I = V /R

Venturimeter is a device used to measure

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Density of a fluid

Speed of a fluid

Pressure of a fluid

Viscosity of a fluid

Which of the following is not a mode of radioactive decay.

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Positron emission

Electron capture

Fusion reaction

A decay

Which six particles and their antiparticles interact by the weak interaction.

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Leptons

Hadrons

Muons

pi mesons

A charged capacitor has charge on its

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Outside surface

Inner surface

Surroundings

Mid point

Wave length of a LASER can be sued as a standard of.

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Angle

Time

Length

Temperature

Neil Bohr made his three postulates in.

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1897

1905

1913

1921

House hold circuits are mostly

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Wired in sires

Wired in parallel

Made using wires of gold

Made using wires of silver

If the pressure in a closed vessel is reduced by drawing some gas the mean free path of the gas molecules.

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Decreases

Remains constant

Increases

First increases then decreases

Matter waves

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Are electromagnetic in nature

Travel with the speed of light

Can be diffracted

Are longitudinal waves

With the increase of temperature, teh pitch of an organ pipe

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Increase

Descrease

Remain the same

May increase or decrease

How much would be the volume of ice formed by freezing 1 litre of water.

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1.0 litre

1.09 litre

1.90 litre

2.0 litre

A fundamental equation in fluid dynamics that relates pressure to fluid speed and height is.

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Equation of continuity

Bernoulli's equation

Stoke's equation

Mass energy eqation.

What is the refractive power of cornea in humans.

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13 dioptres

23 diaoptres

33 dioptres

43 dioptres

A perfect back body

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Is a perfect absorber of all radiations

Is a perfect reflector of all radiations

Is a perfect reflector of visible lights radiations

Is a brownish object

The scalar product of two vectors in negative when

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Vectors are parallel

Vectors are antiparallel

Vectors and perpendicular

Vectors are parallel with same magnitude

Who proposed the thermodynamic scale of temperature.

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Saadi carnot

Lord Kelvin

Sir james dewar

Gabriei fahrenheit

The 1st condition of equilibriums satisfied if.

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Linear acceleration is zero

Angular acceleration is zero

The vector sum of all the forces is zero

The vector sum of all the torque is increase

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