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A lab technician wants to measure the electric current flowing through a circuit. The circuit consists of a load Resistor R=4 connected at the terminals

A lab technician wants to measure the electric current flowing through a circuit. The circuit consists of a load Resistor R=4 connected at the terminals of a battery with internal resistance r=2 and emf e = 10V. The lab technician being amateur connects the (ideal) Ammeter WRONGLY in parallel to the battery. what is The terminal voltage of the battery

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