Question # 1

Cosmic rays mostly comprise of

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Neutral particles

Negative charged particles

Positively charged particles

Ions

If a rope in a hand makes 10 oscillations after every 2 s. the frequency of the wave is.

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2 C s-1

5 C s-1

10 C s-1

20 C s-1

The centre of the sun produces a large amount of energy what is the source of this energy.

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Chemical reaction

Nuclear fission

Nuclear fusion

Radioactive decay

In de Brogile model electron orbit must form

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Spectrum

Wave packets

Franhoffer lines

Clouds

Geiger counter was designed by

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Wilson

Geiger and Muller

Lawrence

Mosely

The particles less in mass than protons are

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Measons

Bosons

Baryons

Nucleons

Light travels perpendicular to electric and magnetic fields and requires no material medium, was proposed by.

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Einstein

Max planck

Maxwell

Bragg

Capacitance is directly proportional to

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Distance between the plates

Di electric strength

Area of the plates

Charge multiplied by the applied voltage

An alternating current can be produced by

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Turbine

Electric motor

Generator

Trnasormer

Which of the following is deflected by an electric field.

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Alpha particles

X rays

Gama rays

Neutrons

A person of height 1.5 m stands 2.0 m in front of a plane mirror How far from the person is her image .

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2.0 m

3.0 m

3.5 m

4.0 m

The photons emitted in inner shell transition are.

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Alpha particle

Beta particle

Gama particle

Characteristic X-rays

A 4 kJ mass of copper of specific heat capacity of 400 J kg-1k-1 is heated for 160 s by a heater of power 200 W what is the rise in temperature.

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10 K

16 K

100 K

160 K

Difference in the density of two medium when waves are passing from one into another medium always results in the change in.

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Wave speed

Wave direction

Both speed and direction

Wave frquency

Who was awarded Nobel Prize for fist artificial atomic transmutation.

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Yukawa

Rutherford

Chadwick

Becquerel

Infrared radiation is also known as

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Radio signals

Heat radiation

Magnetic resonance waves

RADAR

If 'p' is the momentum of an object of mass 'm' the expression p2/m has base units identical to.

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Power

Force

Velocity

Energy

When the deforming force applied on a body produces change in volume then it is said to be

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Tensile stress

Compression stress

Shear stress

Shear modulus

A fixed pulley is emplyed to

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Do some work

Change the directionof force

Do more work with the same force but without using the pulling

Have mechanical advantage greater than 1

Solar cells are thin wafers made from

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Uranium

Nickel

Silicon

Cadmium

The volume of a goas at constant pressure is directly proportional to the temperature as measured on the.

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Celsius scale

Kelvin scale

Fahrenheit scale

Baume scale

To final image produced by a compound microscope is.

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Real and inverted

Real and erect

Virtual and erect

Virtual and inverted

Alpha particles emitted from a radioactive material are.

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He nucliei

H -nucliei

Li nucliei

B nucliei

The mechanical equivalent of heat

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Has the same dimension as heat

Has the same dimension as work

Has the same dimensions as energy

Is dimensionless

What is the amount of mechanical work done to melt 1 g of ic completely

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4.2 J

42 J

80 J

336 J

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

Which statement for geostationary orbit is false.

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A geostationary orbit must be directly above the equator

All satellites in a geostationary orbit must have the same mass

The period of a geostationary orbit must be 24 hours

There is only one possible radius for geostationary orbit

The rate of which blood is delivered to the patient in a transfusion depends on

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Hight of the blood level in the suspended container

Volume of the container

Shape of the container

Material of the container

In an isobaric process there is no.

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Pressure change

Internal energy change

Heat exchanged

volume change or work done

The change in wavelength of an X-ray when scattered from an electron is called.

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Compton shift

Doppler shift

Stefan's law

Fraunhofer lines

A diver leaving the diving board makes a somer sault in the air.

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This is due to gravitational force

The moment of inertia is decreased during the turn

His moment of inertia is increased

He pushes at the air for making the true

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