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6V
1A
What does 6V mean?
What does 1A mean?
Lamp A
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• The flow over the Huka Falls fluctuates between 32 and 270 cubic metres per second. On average the daily flow over the falls is 160 cubic metres per second
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If there are 7 drops of water in 1cm3, how long would it take for
6,000,000,000,000,000,000 (6 million million million drops)
drops of water to flow over the Huka Falls?
(average flow rate = 160cubic metres per second)
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6,000 cubic metres/second
• Time for 6 million million million drops?
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6V
1A
Two lamps Identical to lamp A are placed in series
What is the brightness of lamp B compared with lamp A?
Lamp B Lamp C
a) B is the same brightness as A
b) B is half as bright as A
c) B is quarter as bright as A
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How many models do we need for electricity?
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LCR Circuit
VLVRVC
VS
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VL
VC
VR
VR is always in phase with current
I
VL leads current by 90˚
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0.01s
0.5A
Current vs time for previous LCR Circuit
Current (A)
Time (s)
If L= 20mH, calculate the Voltage at t=0s