2005 a level physics

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  • 8/16/2019 2005 a level physics

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    #.

    a( 4tate the principle of conservation of momentum.

     b( ? car accelerates from 10 m sD1 to !0 m sD1 in # seconds.

    5hat is its acceleration9 'v = u + at (

    c( 5hich one of the following is the unit of power9

     Eoule 2elvin 2ilogram watt

    d( Name two methods by which heat can be transferred.

    e( ? wave motion has a freuency of # h- and a wavelength of 00 m.alculate the speed of the wave. 'c = f G(

    f( Infrared radiation is part of the electromagnetic spectrum.

     Name two other radiations that are part of the electromagnetic spectrum.

    g( Name the electrical component represented in the diagram.

    h( 7ist two safety devices that are used in domestic electric circuits.

    i( 5hat is the photoelectric effect9

     E( Name a material used as shielding in a nuclear reactor.

    $.

    'i( )efine pressure and give the unit of pressure.

    'ii( Name an instrument used to measure pressure.'iii( The earth is covered with a layer of air called the atmosphere. 5hat holds this layer of air close to the earth9

    'iv( )escribe an experiment to show that the atmosphere exerts pressure.

    'v( The type of weather we get depends on the atmospheric pressure. )escribe the 2ind of weather we get when the

    atmospheric pressure is high.

    'vi( The ?frican elephant is the largest land animal.

    ?n elephant weighs "0 000 N and is standing on all four feet each of area 0. m.

    alculate the pressure exerted on the ground by the elephant.

    'vii( 5hy would the pressure on the ground be greater if the elephant stood up on Eust two feet9

    ' P = F/A(

    %.

    'i( Ceflection and refraction can both occur to rays of light.5hat is meant by the reflection of light9

    'ii( 4tate the laws of reflection of light.

    'iii( )escribe an experiment to demonstrate one of the laws of reflection of light.

    'iv( The diagram shows a ray of light travelling from glass to air.

    ?t H the ray of light undergoes refraction.

    xplain what is meant by refraction.

    'v( 5hat special name is given to the angle of incidence i, when the effect shown in the diagram occurs9

    'vi( In the diagram the value of the angle i is "1.

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    'ix( ive a use for a thermistor.

    9.

    'i( 5hat is a magnetic field9

    'ii( )raw a s2etch of the magnetic field around a bar magnet.

    'iii( )escribe an experiment to show that a current carrying conductor in a magnetic field experiences a force.

    'iv( 7ist two factors that affect the si-e of the force on the conductor.

    'v( ? coil of wire is connected to a sensitive galvanometer as shown in the diagram.

    5hat is observed when the magnet is moved towards the coil9

    'vi( xplain why this occurs.'vii( )escribe what happens when the speed of the magnet is increased.

    'viii( ive one application of this effect.

    10.

    'i( The electron is one of the three main subatomic particles.

    ive two properties of the electron.

    'ii( Name another subatomic particle.

    'iii( The diagram shows a simple cathode ray tube.

     Name the parts labelled ?, H and .

    'iv( lectrons are emitted from ?, accelerated across the tube andstri2e the screen.

    xplain how the electrons are emitted from ?.

    'v( 5hat causes the electrons to be accelerated across the tube9

    'vi( '5hat happens when the electrons hit the screen9

    'vii( 8ow can a beam of electrons be deflected9

    'viii( ive one use of a cathode ray tube.

    11.

    Cead the following passage and answer the accompanying uestions.

    There are different forms of energy. Fuels such as coal, oil and wood contain chemical energy. 5hen these fuels are burnt, the chemical energy changes into heat and light energy. lectricity is the most important form of energy in the

    industrialised world, because it can be transported over long distances via cables. It is produced by converting the

    chemical energy from coal, oil or natural gas in power stations.

    In a hydroelectric power station the potential energy of a height of water is released as the water flows through a

    turbine, generating electricity.

    nergy sources fall into two broad groupsL renewable and nonrenewable. Cenewable energy sources are those which

    replenish themselves naturally and will always be available & hydroelectric power, solar energy, wind and wave

     power, tidal energy and geothermal energy. Nonrenewable energy sources are those of which there are limited

    supplies and once used are gone forever. These include coal, oil, natural gas and uranium.

    '?dapted from the 8utchinson ncyclopaedia of 4cience, 1==

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    1.

    'a(

    To calibrate a thermometer, a thermometric property and two fixed points are needed.

    'i( 5hat does a thermometer measure9

    'ii( 5hat are the two fixed points on the elsius scale9

    'iii( xplain the term thermometric property.

    'iv( Name the thermometric property used in a mercury thermometer.

    'v( ive an example of another thermometric property.

    'b(

    'i( 5hat is meant by 'i( diffraction, 'ii( interference, of a wave9

    'ii( In an experiment, a signal generator was connected to two

    loudspea2ers, as shown in the diagram. Hoth spea2ers are emitting a

    note of the same freuency and same amplitude.

    ? person wal2s along the line :.

    )escribe what the person hears.

    'iii( 5hat does this experiment demonstrate about the nature of sound9

    'iv( 5hat is meant by the amplitude of a wave9

    'c(

    The diagram shows a gold leaf electroscope.

    'i( Name the parts labelled ? and H.

    'ii( ive one use of an electroscope.

    'iii( xplain why the gold leaf diverges when a positively charged rod is

     brought close to the metal cap.

    'iv( The positively charged rod is held close to the electroscope and the

    metal cap is then earthed.

    xplain why the gold leaf collapses.

    'd(

     NaD# is a radioactive isotope of sodium. It has a half life of 1 minute.

    'i( 5hat is meant by radioactivity9

    'ii( Name a detector of radioactivity.

    'iii( xplain the term half life.

    'iv( 5hat fraction of a sample of NaD# remains after ! minutes9

    'v( ive one use of a radioactive isotope.