Question # 1

Which of the following gives discrete emission spectrum.

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Sun

Candle

Incandescent filament

Mercury vapour lamp

Which of the following is the science of measuring the heat of chemical reactions or physical changes.

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Thermometry

Calorimetry

Telemetry

Photometry

The angle of scattering for which the Compton shift is maximum is.

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0^o

45 ^o

80 o

180^o

In a compound microscope magnification will be large if focal length of eyepiece is

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Large

small

Equal to that of the objective

Larger than that of the objective

A terrestrial telescope produces

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An react and real image

An inverted and real image

An inverted and virtual image

An erect and virtual image

Refractive index of a medium is define das.

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speed of light in vaccum/speed of light in medium

Speed of light in medium/Speed of light in vacuum

Speed o flight in air/speed of light in medium

Speed of light in medium/Speed of light in air

The resistance of a capacitor when it is connected with a battery is.

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Zero

Finite

Infinite

The same

The mass of proton is equal to.

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1.673 x 10^-27 kg

1.673 x 10²⁷ kg

9.1 x 10-31 kg

9.1 x 10³¹ kg

Who invented the first closed tube thermometer in 1713

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Gabried Fahrenheit

Galileo

anders Celsius

Lord Kelvin

The loudness of a sound depends on its

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Wavelength

Frequency

Wave amplitude

Regularity

One particle having zero mass and zero charge is.

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Positron

Electron

Neutrino

Neutron

The property of a material to return to it original shape and size on the removal of an external force is called.

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Stress

Strain

Toughness

Elasticity

Binding energy per nucleon is.

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Greatest for heavy nuclei

Least for heavy nuclei

Greatest for light nuclei

Greatest for medium weight nuclei

Who studied freely failing bodies using modern scientific method.

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Galileo

Issac newton

Abert Einstein

Alkundi

Which of the following is not a mode of radioactive decay

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Nuclear fusion

Alpha decay

Electron capture

Positron emission

Lenz's was a physicist of.

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America

Russia

Japan

China

A galvanometer can be converted into voltmeter by connecting in series with the galvanometer a

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Low resistance

High resistance

Resistance of intermediate range

Shunt

If the image is virtual then its distance from the lens is taken.

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Positive

Negative

Double

Half

According to kinetic theory of gases one assumes that the collisions between molecules are.

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Perfectly elastic

Perfectly inelastic

Partly elastic

Partly inelastic

The photons emitted in inner shell transition are.

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Alpha particle

Beta particle

Gama particle

Characteristic X-rays

The special theory of relativity was presented in 1905 by

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Young

Planck

Schrodinger

Einstein

If temperature of the sink is decreased the efficiency of a Carnot engine

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Increases

Decreases

Remains constant

First increases and thend ecreases

The resistance between(+) and (-) inputs of an amplifier is.

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Zero

Low

High

Infinity

The best instrument used for the measurement of emf of a cell a

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A voltimeter

An ammeter

A potentiometer

Wheatstone bridge

Which of the following quantities has three significant figures.

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3.0066 m

5.05 x 10^-27 kg

301.0 s

1.009 m

Which one of the following solids exhibits only shot range order.

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Amorphous solids

Polymeric solids

Crystalline solids

Metals

When of the following radiations are not emitted by electron transitions in atoms.

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Visible rays

Ultraviolet rays

Infrared radiations

Alpha particles

The closed end of an organ pipe having longitudinal stationary waves in it behaves as

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Antinode

Source of waves

Node

Antinode

Which of these is not a method of charging.

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Friction or rubbing

Induction

Contact or touching

Convection

The temperature which is the same in ^oC and ^oF is.

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-20

-40

20

40

A mercury in glass thermometer and thermocouple thermometer are both calibrated using the same fixed point of 0 oC and 100 oc when both temperature are used to measure the temperature of a body the temperature measured on both thermometers will be exactly the same

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For all temperatures between 0 oC and 100 o C only

Only are the fixed points

For all temperatures at all times

When converted to the Kelvin scale

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