Physics
Physics
Problem
To determine the equivalent resistance of two resistors, when connected in series, the correct way of connecting the ammeter and voltmeter in the circuit is?  Intuitive explanation
This problem tests whether you understand the ideal placement of measuring instruments in a circuit. An ammeter measures current and must be in series with the circuit (so all current flows through it), while a voltmeter measures potential difference and must be in parallel across the component you're measuring. For two resistors in series, you need the ammeter anywhere in the main loop to catch the total current, and the voltmeter connected across both resistors together to read their combined voltage drop—this gives you .
Intuitive explanation
This problem tests whether you understand the ideal placement of measuring instruments in a circuit. An ammeter measures current and must be in series with the circuit (so all current flows through it), while a voltmeter measures potential difference and must be in parallel across the component you're measuring. For two resistors in series, you need the ammeter anywhere in the main loop to catch the total current, and the voltmeter connected across both resistors together to read their combined voltage drop—this gives you .