An ideal battery sends a current of 5A in a resistor. When another resistor of value 10 Ω is connected in parallel, the current through the battery is increased to 6A. Find the resistance of the first resistor.
Given, current in resistor,
Current in a parallel setup,
Let the resistor be R
Voltage in the first case, —————(1)
Let R’ be the equivalent resistance.
Voltage in the second case, —————(2)
now, (1) should be equal to (2).