Question # 1

Two waves which combine to produce a resultant by reinforcing each other of every point demonstrate.

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Destructive interference

constructive interference

Refraction

polarization

Huygen's principle is used to explain the

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Speed of light

Dispersion of light

Propagation of light

Reflection of light

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

Which of the following will not acceleation.

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The moon in its orbit

A tennis ball rebounding from ground

A store in free fall

A car in which the engine thrust is equal to the friction

When a dielectric material is placed in an electric field it

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Conducts

Exhibits an electrical discharge

Become polarized

Undergoes electrolysis

Which one of the following has maximum frequency.

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Visible light

Gama rays

Ultraviolet rays

Infrared rays

A Carnot engine can be 100% efficient of the sink is at.

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0 k

0 oF

0 oC

273 K

The dispersive power of a grating is

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Light used

Separation of lines

Frequency of light used

Independent of wavelength

Electric Heater operates on the principle of.

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electromagnetism

Electromagnetic induction

Electrolysis

Momentum

The internal energy of an isolated system

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Is zero

Keeps on changing

Remains constant

Cannot be judged

The SI unit of current gain is.

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Ampere

Ampere metre

Ampere volt

It has no unit

During a thunderstorm, an observer sees a lighting flash Six second later he hears the thunder The speed of sound is 330 m s-1. Approximately how far away is the observer from the lighting.

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1/2 km

1/3 km

2 km

1/20 km

Drag force between two layers under consideration depends on

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Distance between the layers

Surface area of layers

Relevant velocity between them

All of the above

The energy delivered to the tissue per unit mass is called the absorbed dose of.

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X rays

gama rays

Radiation

energy

The division and germier experiment relates to

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Diffusion

interference

Polarization

Electron diffraction

When all the systems taking part in a process are included, the entropy.

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Decreases

Either remains constant of increases

Either remains constant or decreases

Remains constnat

What invention is generally referred to as the first capacitor.

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Mason Jar

Kleist Jar

Layden Jar

Ohm Jar

A complete amplifier circuit made on a silicon chip and enclosed in a small capsule is

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Inductor

Metal detector

Diode

Operational amplifier

Optics is the

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Scientific study of light and vision

Scientific study to sound

Scientific study of time

Scientific study of fluid

When a body is lifted through a height 'h' the work done on the body appears in the form of.

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K.E

P.E

Heat

Density

The electromagnetic waves propagated outing space from antenna of a transmitter are known as.

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Infrared waves

Light waves

Radio waves

X-rays

Which instrument measures the magnification of a telescope.

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lactometer

dynamometer

Wattmeter

Ammeter

An ideal engine can be 100% efficient only if its exhaust temperatute.

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Equal to input temperature

Less than is input temperature

More than its input temperature

0 ^oC

The are between the velocity time graph and the time axis is numerically equal to.

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Distance moved by the object

Speed of the object

Velocity of the object

Acceleration of the object

A water wave is an example of

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Electromagnetic wave

Longitudinal wave

Transverse wave

Reverberation

Highly conducting state of matter is

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Conductors

Plasma

Semiconductors

Insulators

Who invented the first closed tube thermometer in 1713

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Gabried Fahrenheit

Galileo

anders Celsius

Lord Kelvin

In Isochoric process there is no

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Work done

Internal energy change

Volume change or work done

Heat exchanged

The process by which nuclei emit a ,b and gama rays in order to attain stability is called.

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Radioactive disintegration

Radio activity

B decay

Radioactive transmulation

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

At room temperature the p.d. between the two sides of depletion region for germanium is of the order of.

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0.3 V

0.5 V

0.7 V

0.9 V

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