Question # 1

At which temperature surface tension of liquid will be maximum

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0 ^oC

20 ^oC

30 ^oC

100 ^oC

The value of open loop gain for the amplifier is

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zero

very low

very high

of an intermediate vaue

The dimensions of viscosity are

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[MLT-1]

[MT-2]

[ML-1T-1]

[ML2T-1]

Prince Louis and Vector de broglie received the Nobel prize in.

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1919

1923

1927

1929

An operational amplifiers will act as an inverting amplifier when the input signal is connected to.

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Inverting terminal

Non inverting terminal

Earthened wire

Both a and b

The band width of an audio amplifier is.

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10 Hz to 10 kHz

20 Hz to 54 Hz

20 Hz to 20 kHz

20 Hz to 60 kHz

The force of friction that comes into action after the motion has started

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Static friction

Dynamic friction

Friction only

Limiting friction

Which term is used for the persistence of sound in a hall.

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Resonance

Acoustics

Symphony

Reverberation

The maximum energy of emitted photoelectron is measured by

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the largest potential difference they can traverse

The current they produce

The potential difference they produce

The speed with they emerge

In the fusion process, there are

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Hydrogen isotopes

Helium Isotopes

Carbon isotopes

Oxygen isotopes

Who devised a technique for the measurement of change on an electron in 1909

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Milikan

Joule

Ampere

Ohm

A double convex lens acts as diverging lens when the object is.

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Inside the focus

At the focus

Between F and 4 F

a 4F

What is the value of earth's magnetics fields.

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5 G

50 G

100 G

500 G

What is the average K.E. of gas molecules at temperature equal to K.

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kt/3

3/2 KT

1/2 KT

2/3 KT

Keliner or achromat eye piece consist or

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Two plano convex lenses with same focal length

Two sets of doublets

An achromatic doublet

A spherical doublet

Who was the first to suggest the existence of a positively charged nucleus in an atom.

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J.J Thomson

R.A Millikan

E.Rutherford

Neil Bohr

The effective resistance in an A.C. circuit is

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An inductance

An impedance

A mutual inductance

Always zero

The critical mass of a fission reaction is.

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The mass to start a nuclear fission reaction

The minimum mass for chain reaction

The size of the reactor core

The size of fuel plus the size of moderator

X-rays are a part of electromagnetic spectrum and are characterized by frequencies higher that those of.

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Infrared radiation

Ultraviolet radiation

Far ultraviolet radiation

Far infrared radiation

X -rays are similar in nature to.

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Alpha particles

Beta particles

Gama rays

Photons

If the cross sectional area of the pipe decreases the speed of the fluid increase according to.

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Venturi relation

Bernoulli's equation

Equation of continuity

Torriculli's theroem

In microwave ovens, heating is produced by the phenomena of

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Reflection

Refraction

Damped oscillations

Resonance

The blooming of the image due to dispersion in lenses is called.

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spherical aberration

Chromatic aberration

Astigmation

Curvature of image field

The field in which the work done is independent of the path followed.

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Conservative field

Electric field

Magnetic field

Non conservative field

Laser light is considered to be coherent because it consists of.

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Many wavelengths

Uncoordinated wavelengths

Coordinated waves of exactly the same wavelength

Divergent beams

Frequency of second pendulum is.

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0.5 Hz

1.0 Hz

1.5 Hz

2.0 Hz

How does heat transfer between objects.

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From cold to hot objects

From hot to cold objects

By electromagnetic radiations

From hotter to hottest objects.

A new class of ceramics materials was discovered in.

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1938

1958

1978

1986

The materials whose resistivity becomes zero below a certain temperature.

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Semi conductors

Super conductors

Insulators

conductors

A neutron is in head on elastic collision with a stationary nitrogen nucleus The mass of nitrogen nucleus is 14 times that of a neutron The neutrons velocity after the collision is.

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Less in magnitude than its intimal velocity

Less in magnitude than the final velocity of the nitrogen atom

Equal in magnitude to its initial velocity but in the opposite direction

Greater in magnitude than its initial velocity

A 800 W toaster and a 1.3 kW frying pan are plugged into the same 120 V lines, then

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Fuse will not blow

Fuse will blow

Supply will spark

Only toaster can work

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