modified 9 years ago

Circuit

00:42:01

Build the circuit. All correct. Know the current 3A. Know the resitense. Voltage unknown. how it output = 6v across 3ohm resistor. 

published 9 years ago

maxmax_66

9 years ago

You have 2 amps through a 3 ohm resistor. Ohm's law might help you understand why you have a 6 volt drop across the resistor.

Robert_Kidd

9 years ago

The 6 Ohm & 3 Ohm are in parallel giving 2 Ohm. You therefore have two sevenths of the voltage across the combined 2 Ohm resistor, that is (21x2)/7=6.

hurz

9 years ago

You pump 3A into a circuit across a 5Ohm resistor. Just remove/short it, cuz its resistance does not have any effect on the result. Now you have 6||3=2Ohm and Ohms law V=I*R gives 2 Ohm * 3A = 6V. That easy.

Robert_Kidd

9 years ago

That's true and you reduce global warming by 75W if you take the 5 Ohm resistor out lol.

hurz

9 years ago

45Watt

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.