Solve Resistance Problem: Parallel Resistors, Closed Switch & 1.2A Reading

[prat]

Homework Statement

if there is a circuit in which switch is open and ammeter reading is 1.2A THERE ARE THREE RESISTORS PARALLEL WHO HAVE SAME RESISTANCE.WHAT WILL BE THE CURRENT WHEN THE SWITCH IS CLOSED

Homework Equations

The Attempt at a Solution

 

[Kaimyn]

Do you have any more information? Perhaps a diagram?

Also, show everyone what you have done so far.

 

[tomcue]

When the switch is closed, the current will increase to 3.6A (1.2A for each parallel resistor). This is because when resistors are connected in parallel, the total resistance decreases, allowing more current to flow through the circuit. In this case, the three resistors with the same resistance will have an equivalent resistance of 1/3 of the individual resistance, resulting in a higher current reading on the ammeter. This can be calculated using Ohm's Law (I=V/R) and the formula for equivalent resistance in parallel circuits (1/Req = 1/R1 + 1/R2 + 1/R3). It is important to note that the voltage across each resistor will remain the same, as they are connected in parallel.