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Tools & Tech W4
Capacitor
Tools & Tech W4
Resistors in Series
Resistors in parallel
Rtotal = 1 / ( 1/R1 + 1/R2 + ... )
Rtotal = R1 + R2 + ...
Rtotal = R1 * R2 / ( R1 + R2 )
Rtotal = 100 + 100
= 200 Ohm
Rtotal = 100 + 100 + 100
= 300 Ohm
Rtotal = 1 / ( 1/100 + 1/100 + 1/100 )
= 1 / ( 3/100)
= 100 / 3
= 33.3 Ohm
Rtotal = 1 / ( 1/100 + 1/100)
= 1 / ( 2/100)
= 100 / 2
= 50 Ohm
Rtotal = 100 * 100 / ( 100 + 100 )
= 10000 / 200
= 50 Ohm
Kirchoff's laws
Kirchoff's Current Law
At any node in an electrical circuit, the sum of currents flowing into that node is equal to the sum of currents flowing out of that node, or
Voltage divider
Kirchoff's Voltage Law
The sum of voltages around a loop in an electrical circuits is equal to 0
V = Vbat * R3 / (R1 + R2 + R3)
= 9V * 100 / (100 + 100 + 100)
= 9V * 100 / 300)
= 9V * 1/3
= 3V
V = Vbat * R2 / (R1 + R2)
= 9V * 100 / (100 + 100)
= 9V * 100 / 200
= 9V * 1/2
= 4.5V