Question

The ammeter, voltmeter and, resistors R₁ and R₂ connected in the circuit as shown below have been checked and found to be correct.



On plugging the key, the voltmeter reads 4.5 V but the ammeter reads 1.5 A. This is most likely because the wires joined to:

(1) resistor R₁ and loose
(2) resistor R₂ are loose
(3) both the resistors R₁ and R₁ are loose
(4) ammeter terminals are loose

Answer 1

According to the given circuit, Ammeter should read 2.15 A instead of 1.5 A. The reason behind the incorrect reading is that the resistor R₂ is loose in the circuit, so the total resistance of the circuit is just equal to the R₁, that's why the ammeter is showing a reading of 1.5 A.

Hence, the correct answer is option 2.