In the diagram, the current in the 3-ohm resistor is 4A. The potential difference between points 1 and 2 is:
Correct answer: A. 20V
- A. 20V
- B. 0.8V
- C. 12V
- D. 1.25V
Explanation
By ohms law, Voltage between 1 and 2V(1,2)= (3+2)*4V(1,2)= 20 volts thus⇒Option A is correct
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Steady current relates charge flow to potential difference, resistance and resistivity, including how temperature changes a conductor's resistance. Sources with internal resistance have terminal voltage below their emf when delivering current, and maximum power output occurs under a specific load condition rather than at zero resistance.
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