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pARALLEL CiRCUiT wiTH TwO BULBS AND
NEwTON’S OpTiCAL DiSC
Make a circuit with two bulbs in series and the motor in parallel. Turn
on the switch and observe. At first, do not use the discs and observe
the brightness of the light. Then use Newton’s optical disc and observe
how bright the bulbs are. When the disc is in place, the motor needs
more energy and the lights are not as bright.
pARALLEL CiRCUiT wiTH TwO BULBS
AND fLYiNG SAUCER
Make a circuit with two bulbs in series and the motor in parallel. Turn on the
switch and observe. The brightness of the bulbs also changes here with or
without the disc on the motor and the disc will begin to fly as soon as you take
your finger off the switch.
WARNING!
Make sure you have plenty of space around you while doing this activity.
Carry out this activity well away from breakable objects. Keep your face away from
the saucer when it is moving. Do not point the flying saucer at people, animals or
objects. The presence of an adult is recommended while carrying out this activity.
pARALLEL CiRCUiT wiTH TwO
BULBS AND LESS pOwER
Make a parallel circuit with two bulbs and a battery. Turn the
switch on and observe the brightness of the light. Compare this
circuit with the one in Activity 9 and note the difference in the
brightness of the light.
You can read more about the difference between a ‘series circuit’
and a ‘parallel’ circuit in Activity 13.
how bright the bulbs are. When the disc is in place, the motor needs
Make sure you have plenty of space around you while doing this activity.
Carry out this activity well away from breakable objects. Keep your face away from
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