How Does Ohm's Law Apply to Parallel Circuits?

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Ohm's Law, expressed as U=IR, applies to parallel circuits by indicating that the voltage across each component is the same as the source voltage. In the example discussed, a current of 200mA through a 50-ohm resistor results in a voltage of 10V, confirming that the source voltage in a parallel circuit is also 10V. This principle highlights that in parallel circuits, while the voltage remains constant, the current can vary across different branches. Understanding this relationship is crucial for solving circuit problems effectively. The discussion reinforces the application of Ohm's Law in analyzing parallel circuits.
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parallel_oef2.gif

*U=voltage

Homework Equations


U=IR (V=IR)

The Attempt at a Solution


200mA=0,2A --> 0,2*50=10V...? So because it's parallel the source should be 10V too right?
 
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n124122 said:
parallel_oef2.gif

*U=voltage

Homework Equations


U=IR (V=IR)

The Attempt at a Solution


200mA=0,2A --> 0,2*50=10V...? So because it's parallel the source should be 10V too right?
Right. :)
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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