10 ohms of resistor and x ohms of resistor are connected in series and 5 ohms, 20 ohms of resistor are connected in series 5 ohms and 20 ohms of resistor are connected parallel to 10 ohms and x ohms total current is 7A and 20 volts of battery connected to the circuit find X ohms and current flows through it and Req in parallel connection?
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In this circuit both resistance are connected in parallel and 20V source with negligible internal resistance is supplying electrical power. Voltage across both resistors is 20V. So power consumed by 10 ohm resistor is equal to 20^2/10 (P = V^2/R) = 40 watt and by 5 ohm resistor it is 20^2/5 = 80 watt.
Total Power consumption = 80+40 = 120 watt.
Cross verification
Current drawn by 10 ohm resistor = 20/10 = 2 amps
Current drawn by 5 ohm resistor = 20/5 = 4 amps
Total current from battery = 2 + 4 = 6 amps
Total power P delivered by battery = voltage × current
P = 20 × 6 = 120 watt (this is equal to power consumption of both resistors.)
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