595. What would be the voltage drop across the parallel branches of the circuit shown in figure «B» of the illustration if the source voltage is 30 volts, the resistance for R1 is 10 ohms, the resistance for R2 is 10 ohms and the resistance for R3 is 10 ohms

The voltage drop across the parallel branches is 10 volts. The equivalent resistance of the parallel combination of R1 and R2 is 5 ohms. With a total circuit resistance of 15 ohms and a 30-volt source, the total current is 2 amps, resulting in a 10-volt drop across the parallel branches (2 amps x 5 ohms).