Short-circuit and fuse

An external circuit with a resistance of 3.8 Ω is connected to an electrical voltage source with Ue=12 V. A current of 3 A passes through the circuit.
Find:
1. source terminal voltage,
2. the internal resistance of the source,
3. maximum short-circuit current.

Your answer:

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You need to know the following knowledge to solve this word math problem:

basic operations and concepts

reasoning

themes, topics

fundamentals of Physics
Ohm's law
electrical engineering

Grade of the word problem

practice for 14 year olds
high school

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