A battery of e.m.f 12volts and internal resistor r=1.5 ohm is connected to an external resistance of 3ohm calculate the current flowing in the circuit
We can use Ohm's Law to solve this problem. Ohm's Law states that the current in a circuit is equal to the voltage divided by the resistance.
In this circuit, the total resistance (external + internal) is:
R = 3ohm + 1.5ohm = 4.5ohm
The voltage across the external resistance is equal to the battery voltage:
V = 12volts
Using Ohm's Law we can calculate the current:
I = V/R = 12volts / 4.5ohm = 2.67Amps
Therefore, the current flowing in the circuit is 2.67Amps.