Question 110Electricity/Electronics - Assistant Engineer70% to pass
If a circuit has resistances of 5, 10, and 20 ohms connected in parallel, what is the combined total resistance of the circuit?
AI Explanation
The correct answer is B) 2.9 ohms.
To calculate the combined total resistance of resistors connected in parallel, we use the formula:
1/Rtotal = 1/R1 + 1/R2 + 1/R3 + ...
Where R1, R2, and R3 are the individual resistor values.
Plugging in the given values of 5 ohms, 10 ohms, and 20 ohms, we get:
1/Rtotal = 1/5 + 1/10 + 1/20 = 0.2 + 0.1 + 0.05 = 0.35
Rtotal = 1/0.35 = 2.9 ohms
The other options are incorrect because they do not properly apply the formula for calculating total resistance of resistors in parallel.
Related Questions
#108 What would be the total current in figure "A" of the circuit illustrated if the value of capacitor C1 was 100 microfarads, capacitor C2 was 200 microfarads and the power supply was 240 volts at 60 Hz? Illustration EL-0038 #109 In the schematic of the electrical circuit shown in figure "A" of the illustration, what is the value of the total capacitance, when compared to the value of equal individual capacitors? Illustration EL-0038 #111 Two 100 watt light bulbs rated at 100 volts are connected in parallel across a 100 volt power supply. What will be the total power consumed by the two bulbs? #112 What is the current flowing through R3 in figure "B" of the illustrated circuit when the switch is closed if the battery voltage is 12 VDC and resistance of R1 is 2 ohms, R2 is 3 ohms, and R3 is 6 ohms, respectively? Illustration EL-0019 #113 What would be the capacitive reactance of the circuit shown in figure "A" of the illustration if the capacitance of C1 was 100 microfarads, the capacitance of C2 was 200 microfarads and the frequency of the source was 60 cycles per second (Hz)? Illustration EL-0038