(d) Light controlled switch/ switches on the bulb at night, switches off the bulb atdaytime.ĩ(a)(i) Magnetic field is a region of magnetic force.
(b)(iii) 1st : the collector terminal is connected to positive terminal of the battery2nd : reverse bias (b)(ii) 1st : R1 and LDR are in series2nd : to function as potential divider (b)(i) 1st : R2 is located at the base terminal2nd : to limit the base current (d) 1st : The water is shallow2nd : load and unload by using small boatsĨ(a) Power = the rate of work done / the rate of energy P = W (c)(ii) 1st : make many holes on the wall2nd : diffraction // spread of energy (c)(i) 1st : made of concrete2nd : because concrete is strong (a)(ii) The gap is bigger than the wavelength 1(b) 1st : smaller amplitude (c)(ii) Volume of air is zero // the air molecules is at rest //kinetic energy is zero 1ħ(a)(i) Transverse wave // mechanical wave 1 (b)(iv) When volume is higher, the temperature is higher // directly proportional 1
(b)(ii) The temperature in Diagram 6.2 is higher // vice versa 1 (d)(i) 1st : The nett force is zero, the object is stationary2nd : The nett force is zero, moves with uniform velocityĦ(b)(i) Diagram 6.2 is higher // vice versa 1 (b)(ii) Same forces / equal in magnitudes // opposite direction 1 (b)(i) same magnitude // opposite direction 1 (d) Industries : smoke detectors / detect thickness of papers / detect leaks inunderground pipe waterMedicine : radioactive tracers/ sterilization,/cancer treatment (c) 1st : show on the graph2nd : half life = 4 hours (b) Background readings // natural radioactivity in the ground, bricks or buildings and 1 Respectively thus produces a pulse of current.Any two marks (c) 1st: The atmospheric pressure which is higher pushes the liquid up through thenarrow tube.Ģnd : The jet air will force the liquid to be sprayed as fine spray liquidĤ(a)(i) / / 1(a)(ii) 1st: The radioactive emission enters the tube through the mica windowĢnd :ionizes the neon gas.3rd : The electron and positive ion are attracted towards the anode and cathode (b) The ratchet knob prevents over tightening // avoid extra pressure 1
PEPERIKSAAN PERCUBAAN MELAKA 2008MARKING SCHEME : PAPER 2
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